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Groups > comp.sys.laptops > #2314
| From | "~misfit~" <shaun.at.pukekohe@gmail.com> |
|---|---|
| Newsgroups | comp.sys.laptops |
| Subject | Re: Should I completely discharge my laptop battery? |
| Date | 2015-01-15 13:35 +1300 |
| Organization | A noiseless patient Spider |
| Message-ID | <m971vf$1o8$1@dont-email.me> (permalink) |
| References | (16 earlier) <m8nb7e$59c$1@dont-email.me> <m8q115$emf$1@dont-email.me> <m8q9et$q8d$1@dont-email.me> <m91koa$og2$1@dont-email.me> <m91rtt$fp8$1@dont-email.me> |
Once upon a time on usenet mike wrote: > 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'). >> > The website was translated into ChEnglish and doesn't make a lot of > sense, but if I were to guess... Sadly with that site you *have* to guess a lot (unless there are informed feedbacks). > 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. I'm leaving the board and cell connected all the time. There doesn't seem to be much in the way of constant drain. I modded it a year ago and have only had to charge once in that time (it only gets light use). > 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. Hmmm, yes that might indeed be the problem - thanks. (I told you I have only basic knowledge of electronics. However I have a cheap rework station that I haven't unpacked yet which was delivered today so I better learn more!) There's not much room in the enclosure for a 'big cap' - or anything else for that matter. I dismantled it several times, re-soldering and hot-gluing it all in place each time. The last time /was/ the last time - I taped it up good (as the plastic threads for the screws weren't made for repeated use and stripped quickly). I'll use it as-is now I think but it's good to know how to combat this issue if I use one of the other modules. Silly me; Where it says "charge current 1,000mA max" I took that to mean what the board will put into the cell - not what the board would take. I was charging my 3,000 A/h cell from a 500mA source and it was taking hours so hooked it up to my 2,000mA plugpack. Well, I shouldn't have walked away for the ~30 minutes that I did! Seems it was dumping extra current as heat, there was hot glue running out of it! I thought that it would just 'take' what it could handle from the source? <shrug> Cheers, -- 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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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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