Which rechargeable battery you prefer for the HP-41?

[Joe Horn]

I've been using NiMH cells in two HP-41's for many years with no problems at all. In a halfnut CX with no card reader they last forever. I recharge them in an external smart NiMH AAA charger by adding magnets to the cells like this:



My source disappeared soon after I bought them, but the 500 mAh and 600 mAh cells mentioned above would last even longer than mine I guess.

By the way, the 41 can use cells with or without nipples, so if you find ones without nipples, go ahead and buy them. They'll work fine.