On Sat, Feb 20, 2016 at 3:31 PM, RussellMc wrote: > 1. They will almost certainly be < 3000 mAh and quite possibly << 3000 mA= h > Exactly what I thought for a "noname" cell claiming higher capacity than my preferred budget cell http://www.vapextech.co.uk/ though I wasn't sure how helpful such a comment would be. > 2. If you are happy to run several in series you could use an eg LM317 to > discharge them at constant current. > I considered the idea of setting up constant current when I've done testing, but didn't think it added much compared to discharging through a constant resistance and logging voltage which provides a perfectly accurate method of measuring electric charge. > 4. I would not recommend discharging NimH below about 0.9V. Lifetime will > be affected. For longest operating life cycles discharge to no lower than > about 1v at modest discharge rates is desirable. > Is that actually the case? I'd certainly not discharge a battery below 1V per cell (there's no useful energy left at that point anyway), but that's because of the risk of cell reversal. I thought NiMH cells were sometimes stored shorted out at 0V? Chris --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .