Dead battery after storage on T400s

From	bp@www.zefox.net
Newsgroups	comp.sys.laptops.thinkpad
Subject	Dead battery after storage on T400s
Date	2025-01-14 01:50 +0000
Organization	A noiseless patient Spider
Message-ID	<vm4ft3$24bue$1@dont-email.me> (permalink)

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The T400s I was given  a few years ago successfully upgraded to 
Windows 10 and seemed to work reasonably well for its age.

However, after not-very-prolonged storage it's absolutely dead,
not responding to the power button until it's plugged into an
AC adapter. This is despite being put away with a full charge
and being shut down, not set to sleep or hibernate 

Once it comes back up it charges the battery in an hour or two
and claims to have about 90 minutes of runtime with the battery
at 90-ish percent of full. That seems rather brief, but it's an
old machine. I don't mind plugging it in, but stone-dead from
the start is sort of a nuisance. 

What's reasonable to expect? The hardware manual seems mute on
the subject. I've looked into replacing the battery, which is
marked 42t4690, 11.1 volts 3.9AH 44WH. It appears to be available
on Amazon, with admittedly vague descriptions. Still, it would be 
nice to know how to test the battery before replacing it. There are
far too many contacts to start probing blindly. 

Thanks for reading, and any suggestions!

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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