Multiple function of charger with 3 different mode: charge, discharge, error detect. Compatible with 1/2/3/4 AA, AAA, C, D Ni-MH Ni-CD rechargeable batteries and 1/2 ...

ALKALINE BATTERIES: 4-pack of 1.5V C cell alkaline batteries ... These batteries are NOT rechargeable; for reusable options, check out Amazon Basics rechargeable batteries ...

[Jay Kickliter] built his own coin cell battery ... re happy to see this charger project come along. Now the bad news. We looked around and indeed you can find LR2032; a rechargeable replacement ...