From: Will Smith (waps100_at_york.ac.uk)
Date: Mon Dec 10 2001 - 13:34:25 EST
Hi,
Does that mean it is impossible to rebuild a thinkpad battery? Or is there
a way of resetting the chip so that it thinks the maximum discharges has
not yet been reached?
Cheers,
Will
> -----Original Message-----
> From: Ray Bayles [mailto:canyonlands_at_theriver.com]
> Sent: 10. prosinac 2001 15:26
> To: Gordan Flego
> Subject: Re: [TP770] Batteries
>
>
> I think the company that tested your battery does not understand how
> Thinkpad batteries work. It is usually the chip that fails... on
> purpose. IBM, ACER, and several other manufacturers design the battery
> to fail after a certain number of discharges (rumored to be 500) but
> nobody really knows. This is done to protect the computer and the user
> as batteries become unpredictable after substantial use as they age.
>
> The sudden drop from 95% to 5% is typical of a batter "that has
> reached the end of its useful product life" as IBM puts it. In other
> words, it is typical of a failure. The chip hasn't failed. It is doing
> what it was designed to do. Even in the rare failure that might occur,
> it wouldn't make any difference unless it happened under the one-year
> warranty limit under which the owner could get a replacement.
>
> I own a repair center that specializes in laptop computers and have
> been in business since 1997. Before that I worked for the Federal
> Government for 30 years... from 1984 as chief of information systems
> for 138 hospitals and clinics. I have repaired or maintained over 8000
> laptops of which 3500 were Thinkpad's.
>
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