Re: Dead battery after storage on T400s

Message-ID	<67882c3d@news.ausics.net> (permalink)
From	not@telling.you.invalid (Computer Nerd Kev)
Subject	Re: Dead battery after storage on T400s
Newsgroups	comp.sys.laptops.thinkpad
References	<vm4ft3$24bue$1@dont-email.me> <vm69c5$2h5vb$1@dont-email.me> <6786cba9@news.ausics.net> <vm8r36$31nmi$1@dont-email.me>
Date	2025-01-16 07:44 +1000
Organization	Ausics - https://newsgroups.ausics.net

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bp@www.zefox.net wrote:
> Computer Nerd Kev <not@telling.you.invalid> wrote:
> 
> After putting the battery back in and booting the t400s the capacity
> indicated 99% but the advertised run time was slightly under two hours.
> That seems rather short, I think the claimed runtime is closer to five.
> Still, if it's true, the laptop is usable to some extent. The most obvious
> use is to run an Owon vds1022i usb oscilloscope, which will mostly be done
> within reach of power.
> 
> A new battery is still worth considering, any suggestions are welcome.

My fear is always of dodgy Chinese Li-Ion batteries burning my
house down, but few seem to care about that in spite of the
ever-rising Li-Ion fire statistics.

> Is it feasible to repair (by replacing cells) the original pack?

I've done that, replacing with cells from a battery from a broken
laptop. The tricky thing is that the battery cases are all stuck
together differently. Some are plastic welded, others
snap-together, others glued (with glue of various strengths). The
battery I dismantled for cells ended up a shredded mess of plastic
due to strong glue, but the plastic welded case for the battery I
was re-celling came apart without much damage.

If attempting that, you do want to remember that denting,
puncturing, or shorting out a Li-Ion cell can all cause it to
catch fire, sometimes after a delay or when charging.

If you do trust the Chinese reproduction batteries, note that
they're often not much more expensive than buying enough new
individual Li-Ion cells (except maybe for the most dodgy
unbranded Li-Ion cells).

-- 
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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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