Do you have any evidence of these batteries failing because of out of balance conditions or is that speculation
Sent from my iPhone > On May 9, 2018, at 9:22 PM, EVDL Administrator via EV <ev@lists.evdl.org> > wrote: > >> On 9 May 2018 at 21:21, Lawrence Rhodes via EV wrote: >> >> wait a couple weeks as totally protected drop in replacements changing >> a 35 ah form factor into a 50 ah battery with many more cycles made >> from lithium was coming. > > I've seen a lot of these around already. I almost bought a small one about > a year ago, but then went in another direction. > > https://www.amazon.com/12-Volt-Rechargeable-Lithium-Battery/dp/B00JK06CK8/ > > They're 12v (sometimes 6v) worth of lithum cells, often LiFePO4, with some > kind of BMS internally so you can (supposedly) charge them with a lead > battery charger. Actually, in many cases all you need is a bare power > supply. > > You have to watch out for them though. There are a lot of cheap Chinese > batteries like this that have just "protection" circuits, not true BMSes. > The cells soon get out of balance, and the usable capacity falls. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
