Batteries for LED calcs, revisited

[Dieter]

(07-01-2018 10:06 PM)mdunn Wrote:  Hey, do whatever makes you happy. The LiPo here is one half to one third the cost of the NiMH packs. And all the "high capacity" (≥ 2 AH) NiMH AA cells I've had experience with have had very short lifespans, whether you use'em or not.

This sounds like you haven't tried Sanyo/Panasonic Eneloops yet. They are available in size AA and AAA, the AAs in both ~2000 and ~2500 mAh. I think these are very reliable cells, and they have virtually no self-discharge. Charge them now, put them in a drawer, get them out one year (or more) later, and they're ready to go.

There are other brands that offer similar batteries, but I can't say anything about these. Why bother when you can get the original, genuine and reliable solution from Panasonic? I bought mine in 2006 (at that time from Sanyo), always charged them in a decent smart charger, and they still work fine. Not just in calculators, but aso in much more demandig devices like flash guns.

Dieter