Re: Should I completely discharge my laptop battery?

From	mike <ham789@netzero.net>
Newsgroups	comp.sys.laptops
Subject	Re: Should I completely discharge my laptop battery?
Date	2015-01-12 17:20 -0800
Organization	A noiseless patient Spider
Message-ID	<m91rtt$fp8$1@dont-email.me> (permalink)
References	(15 earlier) <m8n7pj$qom$1@dont-email.me> <m8nb7e$59c$1@dont-email.me> <m8q115$emf$1@dont-email.me> <m8q9et$q8d$1@dont-email.me> <m91koa$og2$1@dont-email.me>

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On 1/12/2015 3:18 PM, ~misfit~ wrote:
> Once upon a time on usenet mike wrote:
> [total snip]
>> Are we having fun yet?
>
> Thanks Mike. I've copied that to notepad and saved it for when I have a bit
> of time to play with.
>
> I have a couple of these too
> http://www.dx.com/p/mp1405-5v-1a-lithium-battery-charging-board-blue-black-219454#.VLRT1MlZqUc
> and used one for re-powering a mini rotary tool I got cheap that used 3x
> small NiCad cells in shrink-wrap, the total size of which was similar to a
> single 18650 but had little 'power' and didn't hold much charge. I bought a
> new solder-tab Panasonic cell for that job as I didn't know how good my
> slavaged cells were and it's hard to open up the modded tool....
>
> However it doesn't seem to like running a motor from the 'out' pads - maybe
> it's something to do with the brushes and how it works? I tried three of
> these PCBs for the job and they all didn't work right. In the end I had to
> wire a small momentary contact switch between the B+ and OUT+ pads to start
> the motor. Once it's started it runs fine from the 'OUT' contacts. <shrug>
>
> As you can probably tell I only have basic knowledge (but try hard to not
> take risks - I'm very aware of the inherant dangers with Li-Ion tech and the
> potential for 'thermal runaway').
>
> Cheers,
>
The website was translated into ChEnglish and doesn't make a lot of sense,
but if I were to guess...

How are you switching the power?

If you're switching between the battery and the board,
that may be your problem.  Sounds like the board has to be powered
up continuously.  I'd measure the drain from the battery in the
off state.  May be inconsequential...maybe not.

If you're switching between the board and the motor, the turn-on transient
from the motor may exceed the 3A current limit.  Maybe a big cap
across the out pads will help.

Thread

Should I completely discharge my laptop battery? andymhancock@gmail.com - 2014-12-30 11:53 -0800
  Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2014-12-31 13:35 +1300
    Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2014-12-31 11:06 -0800
      Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2014-12-31 11:54 -0800
        Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-01 15:13 -0800
      Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-01 12:29 +1300
    Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2014-12-31 12:05 -0800
      Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-01 12:55 +1300
        Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-01 14:51 -0800
          Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-02 14:16 +1300
            Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-01 18:11 -0800
              Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-02 01:15 -0800
                Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-02 09:34 -0800
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-02 10:46 -0800
                Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-02 14:25 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-04 12:28 +1300
                Re: Should I completely discharge my laptop battery? andymhancock@gmail.com - 2015-01-03 16:48 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-07 14:47 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-06 19:38 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-09 13:36 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-08 17:34 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-10 14:59 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-09 20:22 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-13 12:18 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-12 17:20 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-15 13:35 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-01-14 17:37 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-16 12:33 +1300
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-02-08 14:24 +1300
                Re: Should I completely discharge my laptop battery? mike <ham789@netzero.net> - 2015-02-07 21:02 -0800
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-02-11 11:09 +1300
                Re: Should I completely discharge my laptop battery? "~misfit~" <shaun.at.pukekohe@gmail.com> - 2015-01-03 11:47 +1300

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