On 5 Feb 2016 at 15:17, Peri Hartman via EV wrote: > I was considering buying an emergency flashlight that stays plugged in > all the time ... I decided not to - until the Chinese develop a better > reputation for putting a BMS in their lithium ion products.
For a cheap gadget like that (or even a small low-range EV) a safer and more economical battery, though you'd have to mind disposal, would be NiCd. You can charge NiCd at a low rate pretty much forever. I suppose you could also use NiMH, but I don't think they withstand that kind of charging as well. Some years ago I bought some cheap made-in-Taiwan crank-dynamo flashlights from the dollar store. I gave away a few as gifts, and kept a couple. I didn't notice until I got them home that the blister card boasted that they had lithium batteries. I'm sure they had no BMS whatsoever. They started obviously losing capacity within weeks, and within a year or two they were storing no energy at all. They'd light up only if I kept cranking them. At least they didn't catch fire. I doubt that I could put that much energy into them by cranking, though. I still have them on a shelf in the basement. Maybe one day I'll bust them open and see if I can fit NiCd cells into them. 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
