English Community

ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
All Forum Topics
Options

255 Posts

11-26-2007

Raleigh, NC

580 Signins

11432 Page Views

  • Posts: 255
  • Registered: ‎11-26-2007
  • Location: Raleigh, NC
  • Views: 11432
  • Message 1 of 72

T400 & T500 Battery size - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-12, 21:17 PM

I've been seeing a lot of discussion around the various notebook communities about batteries, and wanted to take a moment to discuss them. The big question on everybody's mind is: which batteries fit flush on the new T400 & T500, and which don't?

 

I'm still trying to get accurate measurements of how far the batteries stick out the back of these machines and I will update this post when I have them. I just wanted to get this out there to hopefully answer people's questions sooner than later. 

 

Lastly, please note this information applies to R400 & R500 as well. 

 

Edit Saw this question out there and I updated the info below to show the extra mount of runtime one battery has over another. Obviously your runtime will vary based on usage, but given the capacity of the battery, one can derive how much longer it will run at a given usage level. 


also, anyone know how much longer the life is on a 9 cell vs a 6 cell?

 


8/14 Edit - Added all battery measurements except 9-cell. Stay tuned. Note that I also included the total depth of the battery, which is how I calculated how far the batteries stick out. (Depth of larger battery) - (Depth of flush battery) = amount sticking out. I'm normally good with numbers and a calculator, but if I made a mistake feel free to correct me.

 

8/18 Edit - The measurements for the 9-cell battery are now below, and added photo comparing two systems. Thanks to Matt Kohut for having the systems and the camera.

 

T400

Short answer - the batteries are the same on T61 and R61 14.1" widescreen:

 

4-cell: Flush

6, 7, 9-cell: Sticks out

(Note: The 7-cell battery is actually replaced by the 9-cell now)

 

Long answer:

 

Length sticking out back of system:

4-cell: 0 inches (1.57 inches deep)

6-cell: 1 inch (2.57 inches deep)

7-cell: 1.08 inches (2.65 inches deep)

9-cell: 1.47 inches (3.04 inches deep)

 

Part number:

4-cell: 41U3196

6-cell: 41U3198

7-cell: 41U3197

9-cell: 43R2499

 

Capacity in Wattage-hours:

4-cell: 37.44

6-cell: 56.16 50% longer run-time than 4-cell

7-cell: 74.88 100% longer run-time than 4-cell, 33% longer than 6-cell

9-cell: 84.24 125% > 4-cell, 50% > 6-cell, 12.5% > 7-cell

 

Important note about 9-cell on T400: As some of you have noted, this battery is uniquely shaped as shown in the photo below. This was done to allow for the increased run-time of the 9-cell battery while still fitting in all of our docking stations. Note that we are no longer offering the 7-cell battery for purchase with new systems and it will not be something offered going forward, you may still be able to purchase it from your local Lenovo teams or resellers/business partners. Contact them directly to find out.

 

Note: These pictures are of a T61, but you get the idea...

 

6-cell vs 9-cell

6-cell T61 on top, 9-cell T400 on bottom

 

T500

Short answer - the batteries are the same on T61 and R61 15.4" widescreen/14.1" standard:

 

6-cell: Flush

9-cell: Sticks out

 

Long answer:

 

Length sticking out back of system:

6-cell: 0 inches (2.3 inches deep)

9-cell: 0.83 inches (3.13 inches deep)

 

Part number:

6-cell: 40Y6799

9-cell: 40Y6797

 

Capacity in Wattage-hours:

6-cell: 56.16

9-cell: 84.24 50% longer runtime than 6-cell

Message Edited by Tim_Lenovo on 08-13-2008 02:53 PM
Message Edited by Tim_Lenovo on 08-13-2008 02:54 PM
Message Edited by Tim_Lenovo on 08-13-2008 03:02 PM
Message Edited by Tim_Lenovo on 08-14-2008 05:38 PM
Message Edited by Tim_Lenovo on 08-14-2008 05:39 PM
Message Edited by Tim_Lenovo on 08-18-2008 02:51 PM
Message Edited by Tim_Lenovo on 09-12-2008 11:04 AM
-----------------------------------
Tim Supples
Lenovo Social Media

Got a question? Don't PM me, post it on the forum!
Lenovo Blogs
X60 Tablet SXGA+ primary, Z61p fully loaded workhorse
Reply
Options

339 Posts

01-20-2008

Canada

316 Signins

6645 Page Views

  • Posts: 339
  • Registered: ‎01-20-2008
  • Location: Canada
  • Views: 6645
  • Message 2 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 1:48 AM

Thanks for posting that, Tim!

 

Wow, a naked ThinkPad T61 (no stickers)... Wish they came like that... LOL

 

Best,

 

MacBook Pro, with an aluminum unibody enclosure **As of September 15, 2008, our company has completely switched to Apple. Having used ThinkPad products for over 10 years, we had desperately tried to find just one reason to continue using these products, to no avail. We are of the view that ThinkPads are no longer premium products. We wish you the best of luck with your ThinkPad! Happy computing…**
Reply
Options

57 Posts

08-13-2008

Michigan

198 Signins

2068 Page Views

  • Posts: 57
  • Registered: ‎08-13-2008
  • Location: Michigan
  • Views: 2068
  • Message 3 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 6:12 AM

Are you saying that the T400 is compatible with the T61 batteries, or just are similarly sized?

 

ie, if I want an extra battery for my T400, can I just buy a T61 battery?

Reply
Options

255 Posts

11-26-2007

Raleigh, NC

580 Signins

11432 Page Views

  • Posts: 255
  • Registered: ‎11-26-2007
  • Location: Raleigh, NC
  • Views: 11432
  • Message 4 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 13:57 PM
That is correct - they are the exact same batteries.
-----------------------------------
Tim Supples
Lenovo Social Media

Got a question? Don't PM me, post it on the forum!
Lenovo Blogs
X60 Tablet SXGA+ primary, Z61p fully loaded workhorse
Reply
Options

4 Posts

08-13-2008

US

17 Signins

130 Page Views

  • Posts: 4
  • Registered: ‎08-13-2008
  • Location: US
  • Views: 130
  • Message 5 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 18:02 PM

The part number for my 6-cell battery that I received on my system configuration differs than the one that you have listed.

 

42V9338   SBB 6 CELL LI-ION BATERRY

 

Could it be that T61 batteries are backwards compatible with the T400 and that the T400 also has new batteries?

 

From looking at the lenovo site to order the T400 it does suggest that 6 cell sticks out but I feel that it could be one of the many errors (although many have been fixed) on the site. 

 

If you look at tabook.pdf the T61 with a 6 cell has a depth of 10.2 inches whereas the T400 with a 6cell has a depth of 9.4 inches suggesting that the 6cell on the T400 would sit fairly flush with the back of the notebook.  I find it hard to believe that the T400 with a 4cell battery has a depth of 8.5 or so inches.

 

Any further information would be appreciated

Reply
Options

255 Posts

11-26-2007

Raleigh, NC

580 Signins

11432 Page Views

  • Posts: 255
  • Registered: ‎11-26-2007
  • Location: Raleigh, NC
  • Views: 11432
  • Message 6 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 18:12 PM

hhayama - What system do you have? Note that individual part numbers on the batteries can differ, as we use multiple suppliers, but the part numbers I referenced will point to the proper battery as I described.  Your other questions are addressed in my original post.

-----------------------------------
Tim Supples
Lenovo Social Media

Got a question? Don't PM me, post it on the forum!
Lenovo Blogs
X60 Tablet SXGA+ primary, Z61p fully loaded workhorse
Reply
Options

4 Posts

08-13-2008

US

17 Signins

130 Page Views

  • Posts: 4
  • Registered: ‎08-13-2008
  • Location: US
  • Views: 130
  • Message 7 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 18:49 PM

I have ordered a T400. 

 

As you mention, in the tabooks.pdf at the bottom of the T400 datasheets, it references the 41U3198 battery as the 6 cell battery.  Just to be safe I have changed my order to the 4 cell battery.

 

Thank you for your quick responses.

Reply
Options

255 Posts

11-26-2007

Raleigh, NC

580 Signins

11432 Page Views

  • Posts: 255
  • Registered: ‎11-26-2007
  • Location: Raleigh, NC
  • Views: 11432
  • Message 8 of 72

Re: T400 & T500 Batteries - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-13, 18:56 PM
hhayama - that is correct, the TABOOK references the same part number as I did. I believe the part number you saw in the e-mail is an internal part number that won't have much significance to our customers.
-----------------------------------
Tim Supples
Lenovo Social Media

Got a question? Don't PM me, post it on the forum!
Lenovo Blogs
X60 Tablet SXGA+ primary, Z61p fully loaded workhorse
Reply
Options

255 Posts

11-26-2007

Raleigh, NC

580 Signins

11432 Page Views

  • Posts: 255
  • Registered: ‎11-26-2007
  • Location: Raleigh, NC
  • Views: 11432
  • Message 9 of 72

Re: T400 & T500 Battery size - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-14, 21:39 PM
Bump for update
-----------------------------------
Tim Supples
Lenovo Social Media

Got a question? Don't PM me, post it on the forum!
Lenovo Blogs
X60 Tablet SXGA+ primary, Z61p fully loaded workhorse
Reply
Options

57 Posts

08-13-2008

Michigan

198 Signins

2068 Page Views

  • Posts: 57
  • Registered: ‎08-13-2008
  • Location: Michigan
  • Views: 2068
  • Message 10 of 72

Re: T400 & T500 Battery size - what sticks out and what doesn't? *EMBEDDED IMAGES*

2008-08-14, 22:29 PM

A question for you Tim... before I ordered my T400, I had talked to a sales rep who told me that the 9 cell would only stick out 1 inch... this is obviously incorrect now that you have found the real depths.  I was told today that my T400 (w/ 9cell) was under production and should be shipped August 24th.  I assume this means there's no way to change the battery to a 6cell, and I should just go ahead and buy an extra 6 cell battery (I bought a case which would have fit the 9 cell had it only stuck out 1 inch, but now I don't think it'll fit).

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete