Acutally NiMH cells have a Coulometric Efficiency of 66%, which means you need put 1/0.66 = 1.51 (or 151%) of the charge back into the battery.(assuming it is fully discharged).
If your target cell were 2700 mAH, and it was dead, then you need to put 2700/0.66 = 4090 mAH. At 200 mA per hour, that would take about 21 hours. 73, Bob, WB4SON On Sun, Apr 14, 2013 at 3:53 PM, Bill Frantz <[email protected]> wrote: > I have always heard that the rule of thumb for charging a depleted NiCd of > NiMh battery is to charge it to 140% of its rated capacity. If you are > charging 2700 mAHr cells at 200 mA, then you will need to charge them for > 18.9 hours. > > Cheers - Bill, AE6JV > > > On 4/14/13 at 7:56 AM, [email protected] (Greg Troxel) wrote: > > 2700/200 is 13.5h, and you need to charge more >> than rated capacity because charging is not 100% efficient. >> > > ------------------------------**------------------------------** > ----------- > Bill Frantz |The nice thing about standards| Periwinkle > (408)356-8506 |is there are so many to choose| 16345 Englewood Ave > www.pwpconsult.com |from. - Andrew Tanenbaum | Los Gatos, CA 95032 > > > ______________________________**______________________________**__ > Elecraft mailing list > Home: > http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> > Post: mailto:[email protected].**net <[email protected]> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
