Both Ni-Cad and NiMh use a constant current technique to charge and most of
these constant current chargers have a high saturation voltage to accomplish
this. The cell voltages are identical for all practicable purposes so the
added capacity of the NiMh should only take longer to charge.
writes>Any you guys rebuild your own NiCad's or NiMh
Search rebuild power tool batteries. THere's a place that offers them
- but the cost ain't cheap!
Supposedly, you can "zap" the old cells and bring them back to life.
I've yet to try this myself.
Where you you get the batteries you mentioned? How much do they cost
in small quantities?
Don't. It kills them all. I did and regret it. I now have 9 unusable
packs and 6 packs that only work for a while. Zapping them makes them die
much quicker, IMHO.
My advice is to combine packs to extend life. Charge a pack, then wait a
day and take apart the pack, and read individual cell voltage. You will
usually have 2 or 3 cells fail to hold a charge before the rest. Cut the
solder tab in the middle between cells, and put cells from another pack in
their place and solder back together.
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