If my original power tool battery is a NiCD battery, can I use a different chemistry battery?
That would depend on both your charger and power tool. A lot of chargers will charge NiMH batteries, and a few others will charge Li-Ion. However, even if your charger will do this, your power tool might not. It is best in these situations, to check your user manual or contact the manufacture to find out the technical specs of your model.
