Revive Nicad Battery Pack. Some people have said that putting a higher voltage on dead batteries does the trick while others stated that reverse charging is what does it. For this method we are going to give the NiCad battery a shock then fully cycle it back into working condition.
The power that these NiCad batteries work with is a different steady voltage of 12v each cell. So I figured out how to open it up and took out the 72V NiCd battery pack. After owning my cordless drill for more than 11 years one of the NiCd batteries wouldnt register on the charger so I thought it was at the end of its cycle.
Mine had dropped to just a little over 6v.
As you use nickel-cadmium NiCad rechargeable batteries and continuously recharge them they hold less and less of a full charge over time. How to restore old batteries at home. Basically you need a DC power supply. People use car batteries too revive dead NiCad batteries but this is not safe and the uninitiated should definitely not try it.
