On Mon, 14 Feb 2005, Philip Pemberton wrote: > In message <23075D38FE1C8144847DFAECA3565F2704E54D45@pai-smx-01.europe.bkhm.net> > "Michael Rigby-Jones" wrote: > >> L-ion cells are quite fussy about charging. It's essentialy a constant >> current charge with a very critical termination voltage of 4.2volts. If >> you try to charge the cells much past 4.2 volts you are likely to end up >> with a fire. > > I've been reading up on that - IIRC charging LiIons at more than 4.2V causes > metallic lithium to plate out on the anode, then that ends up reacting pretty > badly with the electrolyte.. Shortly afterwards, the cells "vent with flame" > (which I assume means "go off like firecrackers"). You can say 'like huge tantalum capacitors'. Look in the periodic table of elements for a reason. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist