DJ wrote:
It is generally accepted that you can charge sealed NiCads at 1/10th
capacity on a continual basis. ( 500mA battery on a 50mA charger)

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DJ,

Yep - that is the 16 hour charge rate and it is the basis for many/most
dumb chargers. Unfortunately, many of us are in a hurry and some
manufacturers have put out equally dumb quick chargers which will
begin toasting battery packs once they have reached full charge. Sadly,
the general public doesn't realize why their cordless items need new
battery packs every year or so.

Gideon