Message-ID: <6786cba9@news.ausics.net> From: not@telling.you.invalid (Computer Nerd Kev) Subject: Re: Dead battery after storage on T400s Newsgroups: comp.sys.laptops.thinkpad References: User-Agent: tin/2.0.1-20111224 ("Achenvoir") (UNIX) (Linux/2.4.31 (i586)) NNTP-Posting-Host: news.ausics.net Date: 15 Jan 2025 06:40:09 +1000 Organization: Ausics - https://newsgroups.ausics.net Lines: 28 X-Complaints: abuse@ausics.net Path: csiph.com!news.bbs.nz!news.ausics.net!not-for-mail Xref: csiph.com comp.sys.laptops.thinkpad:566 bp@www.zefox.net wrote: > Turns out I searched the manual for "battery testing" and variations, > but the test points were revealed under "charging". My bad.... > > With the battery status at 99% the removed battery measures 12.2 volts, > which seems pretty good. The run-time still seems short however. The "battery status" charge percentage is a measure of the battery voltage by the computer, so not surprising that it looks good at 99% charged. The symptoms sound like a typical worn out battery. > It further turns out that the power button was set to sleep, not shutdown. Well that explains the fast self-discharge. Some laptops do seem to wear down the battery more when stored for a long time than if the battery is removed. I'm not sure if the T400s is one of those, but it shouldn't discharge as quickly as you describe if it was fully turned off. > One pleasant surprise is that the machine seems to work fine with the > battery physically removed. I think every laptop I've encountered worked fine without a battery. -- __ __ #_ < |\| |< _#