Super Simple NiCd/NiMH Charger

A few years ago the charging of Nickel Cadmium cells was a fairly standard procedure. An AA sized NiCd cell used to have a capacity of 500 or at most 600 mAh. You bought or built a charger that was rated for that capacity and you could use it to charge virtually all AA NiCd cells. The capacity of these popular rechargeable cells has increased enormously, especially since the advent of Nickel Metal Hydride cells. Nowadays AA cells are available in any imaginable capacity up to 1800 mAh (at the time of writing).