Re: Dead battery after storage on T400s

From	bp@www.zefox.net
Newsgroups	comp.sys.laptops.thinkpad
Subject	Re: Dead battery after storage on T400s
Date	2025-02-07 19:05 +0000
Organization	A noiseless patient Spider
Message-ID	<vo5li8$3kbd1$1@dont-email.me> (permalink)
References	(5 earlier) <vm9dpk$358ri$1@dont-email.me> <6788814f@news.ausics.net> <vmbb25$3ifk0$1@dont-email.me> <6789c619@news.ausics.net> <vmcm67$3tept$1@dont-email.me>

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bp@www.zefox.net wrote:
> The core error I made was not realizing the power-off
> button was only putting the machine to sleep. Now it's turning off
> for real and does seem to remain off. Self-discharge isn't a problem,
> after all is said and done.

After some deliberation I ordered a battery from amazon for slightly
under $100, on the thesis that at least I'd avoid creating another online
identity and the returns are fairly straightforward.

It arrived more than a month early, which seemed odd. It seems to fit with
a little fiddling, though the plastic case is very slightly warped.

I settled on a test cycle of simply letting the machine idle without
sleeping, using the "best battery life" performance setting. The new battery,
after the suggested three charge/discharge cycles, yielded around 4.5 hours
till self-shutdown.

When I repeated the test with the original battery, the run time seemed to
be around 4 hours. The longest run times reported on-line were maybe five
hours, though it's not clear what the test settings for power were.

Does anybody have a sense whether this is reasonable? I'm told the original
battery dates from the purchase time, around 2009. I think it was taken out
of service around 2020 and given to me in 2024, so the oem battery is about
fifteen years old. I'm very surpised the old battery works so well, if in
fact the as-new runtime was five hours..

Thanks for reading, and any sanity checking 8-)

bob prohaska

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Dead battery after storage on T400s bp@www.zefox.net - 2025-01-14 01:50 +0000
  Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-14 18:11 +0000
    Re: Dead battery after storage on T400s not@telling.you.invalid (Computer Nerd Kev) - 2025-01-15 06:40 +1000
      Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-15 17:25 +0000
        Re: Dead battery after storage on T400s Adrian Caspersz <email@here.invalid> - 2025-01-15 21:02 +0000
          Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-15 22:03 +0000
        Re: Dead battery after storage on T400s not@telling.you.invalid (Computer Nerd Kev) - 2025-01-16 07:44 +1000
          Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-15 22:45 +0000
            Re: Dead battery after storage on T400s Computer Nerd Kev <not@telling.you.invalid> - 2025-01-16 13:47 +1000
              Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-16 16:10 +0000
                Re: Dead battery after storage on T400s Computer Nerd Kev <not@telling.you.invalid> - 2025-01-17 12:53 +1000
                Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-01-17 04:26 +0000
                Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-02-07 19:05 +0000
                Re: Dead battery after storage on T400s not@telling.you.invalid (Computer Nerd Kev) - 2025-02-08 07:49 +1000
                Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-02-08 20:33 +0000
                Re: Dead battery after storage on T400s not@telling.you.invalid (Computer Nerd Kev) - 2025-02-09 09:54 +1000
                Re: Dead battery after storage on T400s bp@www.zefox.net - 2025-02-09 01:44 +0000

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