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Re: Laptop battery loses charge when off??

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Somewhere on teh intarwebs micky wrote:
> On Sun, 24 Feb 2013 01:57:04 -0500, micky <NONONOmisc07@bigfoot.com>
> wrote:
>
>> Why are my laptops discharging when hibernated?
>
> I came across some info on this, straight from Acer, which is the
> brand of laptop I have.
> http://acer.custhelp.com/app/answers/detail/a_id/2384/session/L3RpbWUvMTM2MzE0MTQwMi9zaWQvaVN4N0Eqa2w%3D
>
> "Storing the battery:
>
> Do not charge up a battery, and then store it away. A stored battery
> should be used every three to four weeks. Let the battery fully
> discharge, then recharge to 40% if you plan to store it again. If you
> store a battery for longer than three to four weeks, the battery could
> fully discharge because the battery circuitry itself consumes power.
>
> "because the battery circuitry itself consumes power"!!!!!!!

Yes, this has been the case for well over a decade now. The 'battery' is a 
collection of Li-Ion cells and some 'smart' circuitry which, amongst other 
things, monitors the state of each cell and attempts to level the load so 
that one cell aging prematurely doesn't take out the whole battery pack.

Also the PU in the battery keep track of things like the serial number of 
the battery, the number of cycles it's undergone and the general health of 
the cells / battery. If there isn't enough power left to keep the PU powered 
up then your battery is bricked - even if the cells are in 90% good 
condition!

It's for this reason that, if you're going to re-pack a battery you need to 
apply a source of current to the PU and associated circuitry before you 
disconect the old cells. I've seen it done, a bench-top variable PSU and a 
couple leads with crocodile clips.... Clip them in just the right place with 
just the right voltage dialed in and then, and only then - you can remove 
the old cells and solder in new ones. Of course if the old battery's already 
bricked due to zero current then you're SOOL.

It's not rocket science.
-- 
/Shaun.

"Humans will have advanced a long, long, way when religious belief has a 
cozy little classification in the DSM."
David Melville (in r.a.s.f1) 

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Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-02-24 01:57 -0500
  Re: Laptop battery loses charge when off?? Computer Nerd Kev <not@telling.you> - 2013-02-24 09:04 +0000
    Re: Laptop battery loses charge when off?? Bert <bert@iphouse.com> - 2013-02-24 15:41 +0000
      Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-02-24 14:29 -0500
    Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-02-24 14:22 -0500
  Re: Laptop battery loses charge when off?? Bob_Villa <pheeh.zero@gmail.com> - 2013-02-24 06:27 -0800
    Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-02-24 14:37 -0500
  Re: Laptop battery loses charge when off?? Charlie Hoffpauir <invalid@invalid.com> - 2013-02-24 09:21 -0600
    Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-02-24 14:40 -0500
  Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-03-12 23:17 -0400
    Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-03-14 19:17 +1300
      Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-03-14 12:48 -0400
        Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-03-15 13:15 +1300
    Re: Laptop battery loses charge when off?? Top <top1sg@suddenlink.invalid> - 2013-03-16 16:45 -0500
      Re: Laptop battery loses charge when off?? micky <NONONOmisc07@bigfoot.com> - 2013-03-16 18:31 -0400
        Re: Laptop battery loses charge when off?? not@telling.you.invalid (Computer Nerd Kev) - 2013-03-16 23:42 +0000
          Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-03-17 15:14 +1300
            Re: Laptop battery loses charge when off?? Computer Nerd Kev <not@telling.you.invalid> - 2013-03-17 09:00 +0000
              Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-03-18 01:29 +1300
                Re: Laptop battery loses charge when off?? Computer Nerd Kev <not@telling.you.invalid> - 2013-03-18 05:20 +0000
                Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-03-19 11:39 +1300
                Re: Laptop battery loses charge when off?? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2013-04-11 15:13 +1200
        Re: Laptop battery loses charge when off?? wrat@panix.com (the wharf rat) - 2013-03-19 15:45 +0000

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