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PostPosted: Sat Jun 12, 2010 1:03 pm 
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ThinkPadder
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Joined: Tue Aug 08, 2006 2:08 pm
Posts: 1079
Location: Hong Kong
My X41T 8-cell has gone dead for some time, and I finally decided to get a new one. I also bought a X61T 8-cell because the original one can now only hold 50-60% of the designed capacity.

I bought them via a mainland Chinese auction/merchant site, both of them were listed as complete new but with cosmetic defects. Both were below USD45 excluding shipping, the X41T 8-cell was slightly cheaper.

For the X61T 8-cell, according to Power Manager, its manufacture date is 2007-04-16 with zero cycle count. It does have some cosmetic defects, but it charged to 100% and now I'm draining it and see how it goes. So far, it has lost one third of the charge after an hour or so, during which I was mainly surfing around the Net.

For the X41T 8-cell, it isn't going as well. It charged to 34% and then stopped. When I unplugged the power cord, the machine then lost power immediately. The manufacture date is 2005-12-09 and strangely, it has a first used date of 2005-09. I'll wait a day or so and see how it goes.

Cheers.


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PostPosted: Sat Jun 12, 2010 1:07 pm 
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ThinkPadder
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Power Manager on the X61T 8-cell

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PostPosted: Sat Jun 12, 2010 1:10 pm 
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ThinkPadder
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Power Manager on the X41T 8-cell

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Image

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PostPosted: Sun Jun 13, 2010 10:20 pm 
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ThinkPadder
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Location: Hong Kong
After calibration, the X61T 8-cell is reported to have a full charge capacity of 62.89Wh out of a designed capacity of 66.24Wh.

The X41T 8-cell remains at 34%, I'm waiting for a replacement now.

Cheers.


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PostPosted: Mon Jun 14, 2010 10:09 am 
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In the case of the X41t battery, looks like they used an controller from a recycled battery.

_________________
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD


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PostPosted: Mon Jun 14, 2010 10:39 am 
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ThinkPadder
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Why say so...?


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PostPosted: Mon Jun 14, 2010 11:53 pm 
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The first use date was 2005-09. They removed the controller from an old battery and did a recell.

_________________
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD


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PostPosted: Tue Jun 15, 2010 10:36 am 
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ThinkPadder
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Sounds logical to me. It looked strange to me as well, but I wouldn't have cared much if it worked anyway.

I'm still expecting the replacement, it should arrive in 2 days.

The X61T 8-cell is a bargain through.

BTW, what do you think I should do we the old batteries...? Find someone to re-cell them? But I heard that the tablet batteries use some special cells in addition to cylindrical ones, so re-celling them could be quite a task...? Or I should just sell them away...?

Cheers.


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PostPosted: Fri Jun 18, 2010 8:55 am 
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ThinkPadder
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Location: Hong Kong
The replacement X41T 8-cell arrived today and so far, it works.

For once, the outlook is much better. I forgot to mention, but the previous one arrived with a cracked case along the back edge between the two halves, and is in overall poor shape. The new one, aside from the marks on the labels, appears to be clean.

The manufacturer date is 2006-07-11 and the first used date is 2006-08. For some reasons, during the initial charge it also stopped at around 3x%, but unlike the previous one, it soon resumed charging, until 100%.

I'm now running a reset and see how it goes.

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PostPosted: Fri Jun 18, 2010 9:14 pm 
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ThinkPadder
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After calibration, the new X41T 8-cell is reported to have a full charge capacity of 53.17 Wh (design capacity 64.8 Wh).


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PostPosted: Sun Nov 28, 2010 9:43 pm 
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Location: melbourne, australia
Hi loyukfai,

Could you please tell me how I can tell if it's the battery is dead and the motherboard is not charging?

I can afford to pay for a replacement battery, but if it's the motherboard is not charging, that would be a waste and damage to the environment with the two batteries.

If I can prove that the motherboard is not charging, I might just get a replacement motherboard from ebay.

Thanks
Marlin


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PostPosted: Mon Nov 29, 2010 10:40 am 
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ThinkPadder
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I don't have the expertise to advise you on this. Though it seems aged battery failures are more common than motherboard failures.

Not to mention that replacing the battery is much easier than replacing the motherboard.

If anybody knows, please chime in.

Cheers.


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PostPosted: Tue Nov 30, 2010 3:52 pm 
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Location: melbourne, australia
thanks, strange enough. the battery, although aged, has been working fine until one day my x41 just couldn't charge it. I was wandering if the problem came from the battery or motherboard.


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PostPosted: Sun Jul 31, 2011 8:40 am 
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ThinkPadder
ThinkPadder

Joined: Tue Aug 08, 2006 2:08 pm
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Location: Hong Kong
marlin9107 wrote:
thanks, strange enough. the battery, although aged, has been working fine until one day my x41 just couldn't charge it. I was wandering if the problem came from the battery or motherboard.
Yeah, it happens. In fact, it just happened to the X61T pack for me. Considering it's only been used (by me, FWIW) for 1-year, it's not so a bargain afterall.

The X41T is still working but the full charge capacity has (predictably) dropped.

Cheers.


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PostPosted: Sun Jul 31, 2011 2:29 pm 
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ThinkPadder
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As this is active, I just wanted to know if anyone here knows if there's an end-user way of resetting the chip once it has reported it has died? (I'd like to know if I can do my own recell)

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PostPosted: Sun Jul 31, 2011 3:00 pm 
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Joined: Thu Apr 12, 2007 8:23 am
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Radioguy wrote:
As this is active, I just wanted to know if anyone here knows if there's an end-user way of resetting the chip once it has reported it has died? (I'd like to know if I can do my own recell)

No, there's no way for an end-user way to reset the chip once it has reported it has died.


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PostPosted: Tue Aug 02, 2011 8:47 pm 
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Joined: Mon Jun 28, 2010 8:28 pm
Posts: 239
Location: etters PA
http://forums.lenovo.com/t5/ThinkVantag ... 2998#M9558

You can, but it's not for the timid.

Dave
http://gimel.esc.cam.ac.uk/james/tp240bat/
viewtopic.php?f=3&t=95772


Here's another one with a link with more information on that.

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