NiCAD vs. NiMH Batteries in Woodstocks

[John Keith]

(05-04-2018 12:28 PM)Dieter Wrote:  Both NiCds and NiMHs are charged with constant current, the charging method is the same. However, due to the much higher capacity the charging time or charging current have to be adjusted. That's why I'd stronly recommend an external charger. See my first post in this thread.

Dieter

Actually, there are other more subtle differences in chemistry between NiCd and NiMH batteries. Long-term "float" charging, e.g. leaving calculator connected to charger after batteries are fully charged, will eventually damage NiMHs. NiCds on the other hand are not damaged by long-term unregulated charging unless the current is excessively high.

Again another good reason to use an external charger made for NiMHs.

John