Thursday, February 28, 2008

dell latitude d830 review

dell latitude d830 review




This is a review of the Santa Rosa refresh Dell Latitude D830. First, let’s start with a little background of Dell’s Latitude series.






dell latitude d830

The Latitude series of laptops is part of Dell’s business line. As business machines, they are more focused on reliability, durability and subtlety (whereas the more consumer-oriented Inspirons tout more powerful media-centric features such as a high-end discrete graphics solution, dedicated media keys, more attractive price points, etc.).




Other series in this lineup include the Precision series (high-powered mobile workstations aimed mostly at high-end graphics professionals, particularly those with the need for 3D rendering) and the newly-released economy-class Vostro series, introduced to replace the now long-in-the-tooth business Inspirons. The Latitude sits squarely in the middle of both lines, providing a balance between high performance and price.




The Latitude comes in a wide variety of flavours, but for most people the choice really lies between the 14.1” 630, and the 830 which is the larger, 15.4” model. This model comes in as a desktop replacement, as its weight isn’t suited to lugging all around town.




The configuration I ended up getting was:


2.2GHz Core 2 Duo T7500, 800MHz FSB, 4MB L2 Cache

2GB DDR2-667 SDRAM

120GB 5400rpm SATA HDD

8X DVD±RW Dual Layer drive

15.4” WUXGA screen

256MB NVIDIA Quadro NVS 140M

Touchpad with integrated UPEK Fingerprint Reader

Intel 4965 WLAN (802.11a/g/n)

9-cell battery

Dell Bluetooth 2.0 (EDR)

Windows Vista Ultimate with media

4-Year Next-Business-Day Parts and Labor On-Site Response Gold Warranty

4-Year Accidental Damage Warranty

I also opted for a few accessories:


Logitech VX Revolution Cordless Mouse

Belkin Travel Surge Protector

Extra 90W AC Adapter

Western Digital Passport 120GB Portable Hard Drive

Interlink Electronics Bluetooth Remote Control

My total cost came to around $2,700, inclusive of shipping and taxes. This was a little more than I was prepared to spend, but I’ll go into more detail later on.




Reasons for Buying:



The reason I needed NEEDED to buy a new laptop was because my last Windows PC, the Compaq Presario X1000, was in serious need for repair. The hinges and power button action were cracked badly, the hard drive was heating up obscenely and the battery held a charge just longer than it took to hard boil an egg. I was, however, impressed with the high quality of the screen, in particular the high WSXGA+ resolution and the computer’s overall performance. I still had the MacBook Pro, but I wasn’t willing to sacrifice both performance and precious hard drive space on running two operating systems and maintaining project and work files for both OS’ on that same tiny hard drive. I work in advertising and events, and my primary use for the system would be Office 2007 Professional, especially Excel (for my cost estimates and budget controls), Project (for project management, especially critical when running multiple promotions and events at the same time) and PowerPoint (for presentations to clients). As I tend to take on other roles when needed, my computer had to be capable of handling Adobe CS3 (for rendering stage designs, advertising collaterals and other items), Premiere (for Audio-Visual Presentations)




I knew then that I would settle for no less than a 15.4” widescreen laptop with at least WSXGA+ or better resolution – preferring to move up to WUXGA. The system also had to be powerful enough to handle the load of specific software I needed to do my job without buckling or slowing down. Finally, my experience with the X1000’s flimsy plastic parts led me to look for a solid and durable, if not rugged build.




I was initially looking at three manufacturers:



Dell (on the primary recommendation of my wife, whose experience with them was top-notch),
Lenovo (First-hand experience with IBM Thinkpads was overall a good experience, not to mention the generally high reputation they enjoy with many people), and
HP (due to the overall aesthetic appeal and excellent after-sales service here in the Philippines.
On top of these three, I was also reviewing Asus’ latest laptops - in particular the G1. I wasn’t too sold on the look and feel of the current Toshibas, and I certainly didn’t like the “cheap” feeling I got with Acers.




The refresh came just in time for my purchase, actually. I was originally planning to get the Inspiron E1505 based on a recommendation from a friend, who has been a Dell user for a few years. Being from The Philippines (where Dell is neither a prevalent brand nor one with real significant retail market share), it was difficult for me to find and units to personally inspect. Ordinarily I would not have qualms with ordering a notebook I had never seen before, but I was getting worried with reviews of the E1505 being a bit on the chunky side. Thankfully, I found a reseller, CoolToyz, about an hour and a half from my house that would CTO various laptops and resell them in-store. When I found their website, I decided to drop by the store to check out the wide variety of laptops they had on sale. I was honestly not that impressed with the look and feel of the E1505, as it was bulky, felt a bit flimsy (especially the lid) and those white bumpers really rubbed me the wrong way. I had not considered the Latitude until I saw the D820 there, and I definitely liked its look and feel a lot more than the Inspiron, in spite of its subdued, very business-y appearance. Plus it felt like a tank (at least, compared to the 1505). With that experience, I decided the Dell laptop for me would be the Latitude series, in 15.4”.




Another unit they had in the store was the Lenovo Thinkpad Z61t. Now I loved the look and feel of this machine – almost enough to make me switch to the smaller screen size - but its relatively low resolution, lack of discrete graphics and ridiculously tiny touchpad turned me off. It was only when I read of the m and p variations did I start to take this series seriously.




Finally, there were the HP Pavillions in 15.4” and 17” models. Unfortunately, while I like the new look and styles of HP’s entire line of notebooks, their popularity made me reconsider. What good is a stylish notebook (assuming you buy it for that) if everyone and their grade school math teacher’s dog’s got it? Plus the lack of anything higher than WXGA+ on the majority of their notebooks made me scratch them off my list completely.




So that left me with only the Latitude and the Z61 Thinkpads to choose from.




Anyway, I was happy to hear that my cousin would be coming here for vacation in July – which gave me about two months to make up my mind and purchase the thing, taking building and shipping times into account.




And so began my obsessive quest to build my ideal workhorse. After fooling around with Dell’s online configurator for about three weeks, I was glad to hear that the D830’s would be given a Santa Rosa refresh – important to me as I wanted the improved battery life, and I wanted to future-proof it for at least three to four more years. Still, however, I held off on buying since there were still no options for discrete graphics. Finally, on the 15th of June, the new Latitudes received the nVidiaQuadros – in particular, the D830 got the NVS140m. I immediately picked up the phone and made an international phone call to place my order. Since I already knew exactly what I wanted, the call took all of twenty minutes. The CSR gave me multiple upgrades without my asking, such as the hard drive (I had asked for a 100GB), the Bluetooth card and the warranties (I had asked for 3-year business, he upgraded me to 4-year NBD with international coverage and Accidental Damage). All in all, it came to around 800 dollars more than I was willing to spend, but for the value I was getting (considering the relatively high price of components and accessories here in the Philippines) it was worth it. I also figured I was saving on international shipping so that gave me a bit more leeway.




I also told him that I was worried about the lead times on building and shipping as my cousin was set to leave in less than two weeks. He said he would try to expedite my case but could not promise anything. Amazingly, the accessories package arrived the following Tuesday, and the laptop package itself arrived two days later. Wow! All in under a week. That really blew me away.




Unfortunately, there was an error in the confirmation e-mail I received. The CSR had mistakenly added a Kensington Notebook Lock in my accessories order, and omitted the Interlink Electronics Bluetooth Expresscard Remote. I’ll address these issues later, under Customer Support.




Other than that, everything arrived as expected and in excellent time and quality. All I had to do now, was wait for my cousin to arrive... one week and counting...




Build & Design:





My wife and I picked up them up at the airport past midnight, and I could barely contain my excitement. We dropped them off at their house, and they came over the following morning. My package had finally arrived. Boy, was I giddy.




The first thing I did was open up the accessories package. Everything was there, as expected, including the notebook lock. In hindsight, I am glad for the mistake. I realize that there will be times I will have to leave my notebook attached to some projector or video system during an event, and the lock will only help me feel a bit more secure. But I digress.




Finally, after much personal and spiritual ceremony, I opened the laptop package. After wading through the two booklets, the 4 media (Vista Ultimate, Drivers and Diagnostics, McAfee Antivirus and Roxio Creator), and the two AC Adapters, I finally made it through to the laptop.





I was impressed with the weight build and feel of this computer – it just feels so much better when you hold it and you knowit’s yours. The body is constructed from a very sturdy magnesium alloy that is absolutely a wonder to hold. Bear in mind, however, that the LCD bezel and the frame of the keyboard area (the black border housing the speakers and keyboard) is plastic, and not magnesium. I’m not sure why they didn’t just construct the entire chassis in the alloy as I think it would have given a better feel to the whole thing. However, it feels very solid, and you get the immediate feeling that this baby is gonna last you a long while. I can attest to the fact that there is absolutely NO flex in the top casing, except when you grab both ends and twist it left and right. But even then, the flex did not affect the screen whatsoever. No ripples here, anywhere. The hinge action is superb, and I can easily open and close the system with one hand – the base does not lift when opening it.




It is, however, HEAVY. I thought I had grown used to the weight of my X1000, and thought I wouldn’t really get a heavier notebook unless I would move up to a 17”. But overall, the weight has not been that much of a problem for me since I’m already used to lugging close to 15 pounds of office stuff in my backpack.




Unfortunately, the build is not without its minor faults. First of all, there is a tiny gap between the lid and the base when the laptop is closed, giving about a millimetre and a half of wiggle when pressing the two together. Not too big a deal, except it spoiled what would have been an otherwise near-perfect build.




Keyboard Overview







Sleep (Fn) - Puts the OS to sleep.
Battery Meter (Fn) - Launches the Battery Meter, so you can check on the charge status and health of your batter(ies)
LCD Fill Aspect (Fn) - Switches between widescreen (16:9) and standard aspect (4:3) ratio displays.
CRT / LCD Toggle (Fn) - Cycles between LCD only, external only and simultaneous video displays.
Speakers - Stereo speakers. They’re pretty loud, too, for the most part.
Trackpoint and Buttons - For those who just can’t live without their beloved Thinkpad analogues, the trackpoint is here for you. Personally, I don’t use it that much due to its finicky sensitivity, especially the push-to-click option. This can be disabled, however.
Touchpad and Buttons - As with most laptops, nothing new to say here.
Biometric Scanner (Fingerprint Reader) - Used to log in various credentials for BIOS, OS and website access with a mere swipe of a finger. The built in TPM system allows up to 21 unique prints to be saved. So, that’s your ten fingers, your ten toes... and I don’t know... your nose, I guess. In practice, I found it to be a major boon for logging into Windows. Also, on occasion swiping my finger wouldn’t work. It would accept the data, and then I’d get an error message, stating that “there are no fingerprints enrolled for this user.” When I manually type my user name and swipe my finger again, however, it works just fine.
But my experience with the Vault and actually successfully using it to log in to websites has been mixed. With the former, I simply can’t get it to work properly. With the latter, it would work...sometimes. The dialog box would pop up only sporadically whenever I surfed to web pages with login screens. And, strangely enough, after I formatted and reinstalled Windows, the Private Information Manager (that’s the name of the program) would only work on Internet Explorer. How VERY strange. I’ve consulted with three Gold techs on this issue and none of them have been able to solve it yet. I certainly don’t want to have to format and reinstall my OS once AGAIN just to solve this problem.




One thing I forgot to mark in the photo is the built-in microphone. It’s that tiny little hole immediately to the left of the right screen hinge, above the Num Lock and Pause keys.




Status Lights







Power Status Light - Turns on when computer is on
Hard Drive Status Light - Blinks when data is being read from or written to the hard drive
Battery Status Light - Turns on steadily to indicate battery status, whether low or charging
Wireless Status Light - Turns on when Wi-Fi is enabled (see Wi-Fi Catcher)
Bluetooth Status Light - Turns on when Bluetooth is enabled (see Wi-Fi Catcher)
One key feature I wish this notebook had was a media card reader. I am glad that the generally useless (for me, at least) IR port was removed, but I also would have liked the option to replace the Smart Card reader with an SD/MMC/MS reader. Or, alternatively, use the front edge of the laptop and stick the reader there. Unless I’m unaware of a really good reason why businesses do not want this feature on their laptops.

lenovo thinkpad t61 review

review of lenovo thinkpad t61




Standard aspect ratio business notebooks are becoming more difficult to purchase these days from different manufacturers, but Lenovo has pulled through for another generation with the ThinkPad T61. The 14" 4:3 T61 is one of the last models of its kind on the market, and it is still every bit as durable and refined as the models before it.



lenovo thinkpad t61


The Lenovo(IBM) T61 4:3 14.1" notebook is offered with a wide array of options, with processors spanning from the Intel T7100 to the T7800, ram up to 4GB, hard drive up to 200GB, Intel turbo memory, Intel Wireless-N, and either the 128MB nVidia NVS 140M or Intel X3100 graphics cards.






The following are the features of the 14" T61 being reviewed:


Screen: 14.1-inch SXGA+ (1400 x 1050) TFT Display,150 NIT, 200:1 Contrast

Processor: 2.0GHz Intel Core 2 Duo T7300 (4MB L2 Cache,800MHz FSB)

Hard Drive: 100GB hard drive (Hitatchi 7k100 7200RPM)

Memory: 1GB x2 2GB Total (PC5300, 667 MHz, DDR2 SDRAM) 4GB max memory

Optical Drive: DVD+-R Double layer / DVD+-RW Drive

External Ports and Slots: Three USB 2.0, one ExpressCard slot, VGA, headphone / line-out, microphone-in, modem, 1Gb Ethernet


Wireless: WiFi (Intel 4965AGN 802.11a/b/g/n), Bluetooth 2.0 w/ EDR

Graphics: nVidia NVS 140M (256MB)

Operating System: Windows Vista Ultimate

9-cell Li-Ion battery (10.8V, 7.8AH)

Dimensions: (WxDxH): 12.3" x 10.0/10.9" w/battery x 1.2-1.4"

Weight: 4lbs 11.1oz, 5lbs 11.6oz w/9 cell battery (6lbs 10.3oz travel weight)






Build and Design



Comparing the outside of the 14.1" T61 to the older T60, it's hard to figure out what all has changed. One clue that may stand out depending on how familiar you are with the hinge setup, is the left hinge is wider than the right hinge. Another subtle change that many diehard Thinkpad users will notice is the sticker has changed from being the older multi-color IBM logo, to just "ThinkPad Tseries". Other than that no visible changes have been made. Internally the 14" T-Series has gained a new LCD roll cage, which helps significantly to reduce screen lid flex, and ripples from pressing hard behind the screen.




Opening up the T61 another subtle but slightly odd change is the LCD is off center. If you are really picky about that sort of thing it may drive you insane, but I didn't even notice it after using the notebook for more than five minutes.







Structure wise the notebook is as strong as ever. Just like the T61p, chassis flex is not present, body panels don't squeak under hard pressure, and palm support is excellent for typing. The palm rest has been redesigned from the previous model, but it doesn't look much different without closer inspection. The front lip overhang has increased, and tasks like upgrading ram are a bit easier, since the palm rest seemed easier to slide off and reinstall.




Performance and Benchmarks





The T61 was an excellent all around performer, without any lag or delay opening programs or switching between programs. Much of this can be attributed to the amount of ram and the 7200rm hard drive which was configured with this model. Even tasks such as light gaming were possible with its business grade nVidia NVS 140M, comparable to the consumer nVdia 8400 GT.




Listed below are the standard benchmarks we run on our laptops to make it easier to compare models head to head.

wPrime is a program that forces the processor to do recursive mathematical calculations, the advantage of this program is that it is multi-threaded and can use both processor cores at once, thereby giving more accurate benchmarking measurements than Super Pi.






Windows Vista Experience Index: Vista Index 4.0

Processor 4.9

Memory (RAM) 4.8

Graphics 4.0

Gaming Graphics 4.6

Hard Disk 4.9





Screen





The only weakness of the 4:3 T61 is the screen in my opinion. The 200:1 contrast ratio really shows throughout normal use, with menus and other screen objects looking washed out. Some darker screens were difficult to view, with screen elements blending into the background. Brightness levels were acceptable for a 14.1" notebook, and I found my comfortable levels to be set at about 85%.






Viewing angles were average, with the colors tending to invert quickly on its vertical axis. Horizontal angles were better, keeping colors true to more extreme angles. Refresh times were also about average, with items like the mouse cursor showing some faint trailing on quick movement.



Keyboard, Touchpad, and Fingerprint Reader




The keyboard hasn't changed much, in fact it is the identical part number to the one found on the older T60. This is great news for those hoping that the trusted layout and feel stayed the same into the new model. Same goes for the touchpad and fingerprint sensor. With many keyboard reviews, you generally see that particular model being compared against the "ThinkPad Keyboard" and this really holds true. You can type comfortably for hours at this keyboard as if it was your desktop in front of you. The support under the keyboard is very sturdy, with absolutely no flex anywhere.







The touchpad, while being on the small side compared to versions found on other laptops, is still easy to operate. I find the semi-rough texture to be preferable to a polished feel for better control, and it seems to hold up longer to oils on your finger without getting too slick. The Trackpoint hasn't changed much over the years, and gives the same feel as it always has. The buttons for both the touchpad and trackpoint give a nice solid clunk when pressed, never needing to be forced to register the click. The fingerprint reader works great, although in general they take a while to get used to the swiping motion. If you have never used one before, it may be a few days before you get the single stroke login down pat.



Input and Output Ports








The speakers on the T61 (as with the previous ThinkPad models) are slightly below average. With the speakers pointing directly down on the lower edge of the palmrest, sounds were muted slightly. If you had the laptop on a soft surface like a bed, the speakers would be completely blocked. Peak volume levels were lacking for loud movie entertainment, but the headphone jack was an acceptable alternative. Sound output was clear and free of any hiss or other interference. A coax digital output is also available through the advanced or advanced mini dock for connecting to your home stereo.




Networking



This T61 was configured with the Intel 4965AGN wireless card, and in daily use it worked without any problems. Reception was always strong and clear if you were within reasonable range of the access point, and it never had any odd dropouts that would kill a long file download. Wired performance was also excellent with the onboard Intel gigabit interface, never giving any hiccups.




Heat and Noise



The T61 managed heat much better than the older T60 under normal use. In situations where the CPU and/or GPU would be close to an idle state, heat was dispersed passively through the chassis and keyboard with the fan turning on in small intervals. Under heavier loads the fans would come on more, but temperature levels stayed in acceptable ranges. Fan noise was minimal, with the 7200rpm drive almost always louder. Below are temperature overlays listed in degrees Fahrenheit:










Battery Of IBM (Lenovo) thinkpad t60





The 9-cell battery on the T61 got just over 4 hours and 30 minutes in testing, with screen brightness at 80%, CPU set to adaptive, and with light internet activity. This was a bit less battery life compared to my 15" T60 running XP, but the key difference seems to be that Vista is slightly more intensive in background activities. For in-flight entertainment, the T61 should be fine for getting through an entire DVD movie.




Conclusion








Being one of the last 4:3 notebooks on the market today, the Lenovo T61 is a clear winner for those who still haven't adjusted to the widescreen format choices. It offers a ton of power for the demanding business user, and you are still able to get most of the features available to the widescreen T61 models. Overall it's great to see Lenovo still notebook format as an option to its customers.

Tuesday, February 26, 2008

hp laptop battery recall

Hewlett-Packard Company Announce Recall of Notebook Computer Batteries

WASHINGTON, D.C. - The U.S. Consumer Product Safety Commission, in cooperation with the firm named below, today announced a voluntary recall of the following consumer product. Consumers should stop using recalled products immediately unless otherwise instructed.

Name of Product: HP and Compaq Notebook Computer Battery Packs

Units: About 135,000 battery packs worldwide, including about 85,000 in the U.S.

Importer: Hewlett-Packard Company, of Palo Alto, Calif.

Hazard: An internal short can cause the battery cells to overheat and melt or char the plastic case, posing a burn and fire hazard.

Incidents/Injuries: HP has received 16 reports of batteries overheating, including four in the U.S. No injuries have been reported. Four cases of minor property damage were reported, including one in the U.S.

Description: The recalled lithium ion rechargeable battery packs are used with various HP and Compaq notebook computers (see list below). The recalled battery packs are a subset of those manufactured March 2004 through September 2004, and will have a bar code label starting with GC, IA, L0 or L1.

Hewlett-Packard and Compaq Notebook Models that may contain a recalled battery pack

HP Pavilion HP Compaq Compaq Presario Compaq Evo
dx4000
dx5000
zd8100
ze4100
ze4100/xt1xx
4200
ze4200
ze4300
ze4400
ze4500
ze4600
ze4700
ze4800
ze5155
ze5200
ze5300
ze5400
ze5500
ze5600
zv5000
zv5200
zx5000
zx5200
nc6000
nc8000
nw8000
nx5000
nx9005
nx9008
nx9010
nx9100
nx9105
9000
9005
1100
2100
2500
R3000
R3200
V1000
X4000
X5000
X6100
n1010v
n1050v

Sold at: National and regional computer and electronics stores, online stores, hp.com and hpshopping.com from March 2004 through May 2005 for between $1,000 and $3,000. The battery packs also were sold separately for between $100 and $130.

Manufactured in: Battery packs manufactured in China and Taiwan.

Remedy: Consumers should stop using the recalled batteries immediately and contact HP to arrange for a free replacement battery by visiting the Battery Replacement program Web site or by calling HP. After removing the recalled battery for their notebook computer, consumers should plug in the AC adapter to power the notebook until a replacement battery arrives.

Consumer Contact: For additional information, visit the HP Battery Replacement program Web site at www.hp.com/support/BatteryReplacement or contact HP at (888) 404-7398 between 7 a.m. and 7 p.m. CT Monday through Friday.

Media Contact: Mike Hockey at (281) 927-9379


Picture of Recalled Computer Batteries


Picture of Recalled Computer Batteries


Picture of Recalled Computer Batteries


Picture of Recalled Computer Batteries

NOTE: Recalled battery packs have bar-code labels starting with GC, IA, L0, or L1

Dell laptop Battery Recall

Dell laptop Battery Recall




Dear Dell Customer,

Dell has identified a potential issue associated with certain batteries sold with Dell Latitude™, Inspiron™, XPS™ and Dell Precision Mobile Workstation™ notebook computers. In cooperation with the U.S. Consumer Product Safety Commission and other regulatory agencies, Dell is voluntarily recalling certain Dell-branded batteries with cells manufactured by Sony and offering free replacements for these batteries. Under rare conditions, it is possible for these batteries to overheat, which could pose a risk of fire.

Potentially affected batteries were sold with the following models of Dell notebook computers or separately as secondary batteries:

  • Latitude: D410, D500, D505, D510, D520, D600, D610, D620, D800, D810
  • Inspiron: 500M, 510M, 600M, 700M, 710M, 6000, 6400, 8500, 8600, 9100, 9200, 9300, 9400, E1505, E1705
  • Precision: M20, M60, M70, M90
  • XPS: XPS, XPS Gen2, XPS M170, XPS M1710

In addition, these batteries MAY have also been provided in response to service calls. The batteries were shipped to customers between April 1, 2004 and July 18, 2006. The words "DELL" and "Made in Japan" or "Made in China" or "Battery cell made in Japan, Assembled in China" or "Assembled in Taiwan" are printed on the back of the batteries.

There is a two (2) step process to identify if your battery is affected:

  1. Check if your battery model MAY be affected. If your battery is not listed, you are not affected.
  2. Check if your specific battery PPID (Dell Part Piece Identification) is affected. This step is necessary to identify if your battery is affected. Only some batteries within each model are affected. If the battery is subject to this recall you will be automatically connected to a replacement order form.
Step 1: Is your battery model affected?

The following battery models, only, MAY be subject to recall:

1K055

C5446

F2100

KD494

W5915

Y1333

3K590

C6269

F5132

OR331

X5308

Y4500

5P474

C6270

GD785 M3006 X5329

Y5466

6P922

D2961

H3191

RD857 X5332
C2603 D5555 J1524 TD349

X5333


C5339

D6024

JD616

U5867

X5875


C5340 D6025 JD617

U5882

X5877


These part numbers are printed on the back of the battery as illustrated below.

Step 2: Is your specific battery affected by this issue?

To determine whether your battery is affected by this issue, you should Click Here.The website will direct you to find and enter an identification number from the back of your battery so as to determine whether the battery is affected by this issue. If the battery is subject to this recall you will be automatically connected to a replacement order form. Dell will also provide a means for you to return the affected battery for proper disposal.

Please note that only the described batteries are subject to this recall and not the notebook computers themselves.

Batteries subject to recall should not be used while awaiting a replacement battery from Dell. You may continue to use your notebook computer using the AC adapter power cord originally provided with your notebook.

Dell apologizes for the inconvenience caused by this issue. Shipment of quality products always has been and continues to be Dell's foremost concern. As always, if you have questions or concerns about this or any other subject, please feel free to contact

Battery Recall --Exchange Program iBook G4 and PowerBook G4

Battery Recall --Exchange Program iBook G4 and PowerBook G4

Apple has determined that certain lithium-ion batteries containing cells manufactured by Sony Corporation of Japan pose a safety risk that may result in overheating under rare circumstances.

The affected batteries were sold worldwide from October 2003 through August 2006 for use with the following notebook computers: 12-inch iBook G4, 12-inch PowerBook G4 and 15-inch PowerBook G4.

Apple is voluntarily recalling the affected batteries and has initiated a worldwide exchange program to provide eligible customers with a new replacement battery, free of charge. This program is being conducted in cooperation with the U.S. Consumer Product Safety Commission (CPSC) and other international safety authorities.

Identifying your battery

Please use the chart below to identify the battery model and serial numbers that apply to your iBook or PowerBook. If the first 5 digits of your battery’s 12-digit serial number fall within the noted ranges, please order a replacement battery immediately.

To view the model and serial numbers labeled on the bottom of the battery, you must remove the battery from the computer. The battery serial number is printed in black or dark grey lettering beneath a barcode. See photos below.

Computer
model
Battery
model
number
Battery serial number range
12-inch
iBook G4
A1061 ZZ338 - ZZ427
3K429 - 3K611
6C519 - 6C552 ending with S9WA, S9WC or S9WD
12-inch
PowerBook G4
A1079 ZZ411 - ZZ427
3K428 - 3K611
15-inch
PowerBook G4
A1078
and A1148
3K425 - 3K601
6N530 - 6N551 ending with THTA, THTB, or THTC
6N601 ending with THTC




Click the images for a larger view.

Note: After removing the recalled battery from the iBook or PowerBook, consumers should plug in the AC adapter to power the computer until a replacement battery arrives.

If you participated in a previous battery recall for any of these computer models or recently purchased or received from Apple an extra battery for an iBook G3, please check your battery serial number in case you received a replacement battery that is affected by this program.

National and regional resellers, catalogers, and Apple's on-line and retail stores sold the computers with the batteries from October 2003 through August 2006. These batteries were also sold separately and may have been supplied as service replacement units.

The Exchange Process

To begin the battery exchange process, you will be asked for the serial number of your iBook G4 or PowerBook G4, the serial number of your battery and a shipping address.

Customers in Australia, New Zealand, South Pacific Islands and Asia (excluding Japan) should contact their local Apple Authorized Service Provider to obtain a replacement battery.

After serial number verification, a new battery will be shipped to you, free of charge. When you receive the replacement battery, please use the same shipping packaging and included prepaid shipping label to return the recalled battery to Apple for proper disposal.

Note: If your battery serial number does not match any of the ranges listed above, you do not have to exchange your battery.

Thank you for your cooperation with this exchange program.

See apple Powerbook G4 notebook batteries click here

Sunday, February 24, 2008

Dell Inspiron 1520 Review

Dell Inspiron 1520 Review


The Dell Inspiron 1520 under review here is the latest 15.4” in an ever-growing succession of what can be categorized as “consumer mainstream” notebooks offered by Dell’s Home & Home Office division. Since the release of the 1520, Dell has also made available a very similar machine, the Vostro 1500, which can be purchased from the Small Business site. Unlike the Inspiron 1520, which can be configured with any one of eight different colors, the Vostro 1500 is solid black. The Vostro also provides a Windows XP option, which is unavailable in the Inspiron 1520.




It should also be noted, for the benefit of anyone who is somewhat new to this website, that there is plenty of additional information on the 1520, including an excellent full-featured review by someone who actually purchased the 1520, as well as a side-by-side comparison of the 1520 and the HP dv6500t; this comparison includes a video that is definitely worth watching for anyone considering the Inspiron 1520, the HP dv6500t or any other 15.4” consumer notebook.






Dell Inspiron 1520 Specs:



* Processor: Intel Core 2 Duo T7300 (2.0 GHz/4MB L2 Cache)


* OS: Microsoft Vista Home Premium


* Hard Drive: 160 GB SATA @ 5400RPM


* Screen: 15.4" WSXGA Widescreen (1680 x 1050)


* Graphics: NVIDIA GeForce 8600M GT 256MB


* RAM: 2.0GB DDR2 SDRAM @667 MHz (2 x 1GB)


* Optical Drive: 8x CD/DVD burner (DVD+/-RW) w/Double Layer Support


* Battery: 9-cell lithium ion >>see more dell laptop battery


* Wireless: Intel 4965AGN


* Weight: 6.4 lbs


* Dimensions: 1.47-1.65” (H) x 14.12 “ (W) x 10.59" (D)


* Ports/Slots: 1 IEEE 1394 (FireWire); 4 Universal Serial Bus (USB 2.0); 8-in-1 Memory Card Reader; VGA Out; S-Video; RJ-45 Ethernet LAN; RJ-11 Modem; ExpressCard 54mm; stereo in, headphone/speaker out and dual digital mics


Initial Impressions








This Inspiron 1520 weighs about six and a half pounds and is considered a mainstream consumer notebook. Though Dell allows customization of the lid in up to eight different colors, our model has a conservative looking black lid. Because of that our machine lacks some of the consumer flair a “Flamingo Pink” lid would have offered. Nonetheless, my first impressions had to do with a couple of things that distinguish the 1520 from its predecessors:



The overall look is very different, in a good way.
The hardware, particularly in the form of graphics processing, will allow the 1520 to perform about as well as any notebook on the market, with the exception of outlandishly expensive gaming machines that lack any concessions with respect to size, battery life and cost.
These two characteristics are what make the 1520 such an impressive achievement. I actually briefly owned the previous Inspiron generation's e1705 model, and reviewed the prior-generation e1405 thin-and-light notebook. I must say, the look of the current lineup is immeasurably more appealing. The old silver-and-white style always got me thinking of things like shag carpet and popcorn ceilings: sure, one can make a case for these innovations, just as one can make a case for thick white plastic trim around a notebook, but in the end (which usually comes within a matter of weeks if not months), the style grows tired, the initial promise hollow. The new Inspiron series design is cleaner, simpler and more tasteful. A cousin of the 1520, which shares its look, is the AMD-based Inspiron 1521.




Purchasing Considerations



Though this notebook was sent by Dell for review purposes and not purchased, I wanted to touch on the above topic, simply because there is something of an art to purchasing a Dell consumer notebook. There are many decisions to make, and like all decisions, they carry with them the opportunity for regret or satisfaction. I heartily endorse this web site’s forums for a little glimpse into the thought, action and subsequent level of satisfaction of other buyers.



As of this writing, deliberately moving along the Dell purchasing highway results in:


An Inspiron 1520 with a fairly basic configuration, but one more than adequate for general media and office tasks, for just over $900.


A deluxe performance configuration, virtually identical to this review machine, for just over $1500.
These prices reflect no special discounts or coupons, just today’s standard upgrades and reductions, which are plainly available to anyone who orders a 1520 today. In any case, at the high end particularly, these prices strike me as very competitive, and a savvy shopper who finds coupons, buys their own memory and times the Dell marketing promotions can do better on price.



One thing I found interesting while configuring a couple of 1520s on the Dell site was the price of a RAM upgrade from 2GB to 4GB: $850. Had I selected a higher-priced starting point, meaning a more full-figured set of warranty and support options, the cost of these 2 gigabytes of RAM would have moved away from the direction of a cool grand, but not by much. I saw no mention of this upgrade including a complimentary iPhone or round-trip flight to London, but it is there and available. That said, I would definitely opt for the T7300 CPU and the 8600M GT graphics included in this review model, if at all possible. While these enhancements will probably add three or four hundred dollars to the final price, they are well worth the cost and will almost certainly give the 1520 a longer useful life.

Monday, February 18, 2008

When the AA or AAA batteries in electronics seem to get low why does it temporarily revive them when you open the cover and swap them around?

When the AA or AAA batteries in electronics seem to get low why does it temporarily revive them when you open the cover and swap them around?


The voltage from a small battery is rather low, typically 1.5v when new and gets lower as they 'wear out'. This continues until the voltage produced gets so low that the device can no longer work.



Low voltage is mostly caused by the battery wearing out, but there is another thing that comes into play in this example.



The other thing is a small amount of oxidization between the batteries and the spring clips that hold the batteries in and make electrical contact. Over time this layer of oxidization builds up between the spring clips and the batteries. Just like a penny is all nice and shiny when new, and gets less shiny when old. This layer of oxidization is not very 'conductive' to electricity and makes it harder for the power to get from the battery into the device.



Here is how this layer of oxidization comes into play. All the time that the batteries are getting weaker (and their voltage is getting lower and lower), this layer of oxidization is getting bigger, and it is causing a further reducing in the voltage that finally makes it to the device. It is actually a combination of the batteries lower voltage (as a result of wearing out), and the increased additional voltage drop through the layer of oxidization that finally reaches a point where the total supplied voltage is too low for the device to work.



So, buy swapping the batteries (actually, you just need to move them around a bit), you physically rub off this layer of oxidization and eliminate the small voltage drop that cause by it. Often, this is just enough to allow the device to work for a little while longer until the battery further discharges.



Oxidization is a well known issue. And it can be avoided several ways: Passing a high current through a connection will 'burn through' any oxidization. Hence, all of the above tends to apply to very low current devices like TV remote controls and not your car's starting battery. (Although, if oxidization gets bad enough, it can effect how your car starts...) Some metals resist oxidization, like Gold. Hence you see 'Gold Plated' connectors on very high end audio cables (note that unless both sides are gold plated, the plug AND the socket, it does not really help :-) Finally, one can try and keep air away from a connection. Every see those special 'wire clips' the telephone guy uses? The ones filled with a jelly? Idea here is to keep air away from the joints and avoid oxidization.



So bottom line, when I am too lazy to get up and change channels on the TV, and the batteries on the remote are wearing out, and I am too lazy to get up and get new batteries. Pulling the battery cover off, and 'moving the batteries around' will often get me though the moment, all without even leaving my chair :-)


A battery behaves like a perfect voltage source in series with an internal resistance, this resistance increases with age and limits the life of the battery. When the battery is taken off load for even a little while, this internal resistance lowers significantly. When the battery is loaded again the resistance rises to at least the same resistance over a short period. Almost everyone has used a torch with an almost flat battery, that seems to light well for a second or two and then dims rapidly. Switching it off then on gives another short burst of brightness. This is electrically similar to removing the batteries from any gadget.



Oxidisation is often used as a scapegoat for battery related problems, however I have never known it to cause a problem in any equipment that is reasonably well cared for, usually and resistance due to a layer of oxide is insignificant compared to the internal battery resistance. A more likely cause is poor spring tension, this can be witnessed by shaking a lit hand torch violently along the axis of the batteries.



Unless the user has very hot hands and changes the batteries very slowly indeed there would not be any significant transfer of thermal energy to the batteries, so heat is unlikely to be the cause.



Please don't throw them in the fire. They really hate that and will seek revenge by maiming you.