The batteries that power them have also changed over the years. Older cordless Ryobi tools were powered by nickel-cadmium ...

If you play your cards right, you'll replace your laptop before you need a new battery. NiCad batteries were some of the first to be used in laptops, but they've been abandoned for good reason.

This turbine can charge a pair of NiCad batteries in about 10 hours, but it might be worth developing some smart circuitry to manage charging. If it were able to choose between a dedicated storage ...

Ahead of the storm we checked our disaster kit and found alkaline batteries (Duracell D8 ) that were best by March 2015. We’re replacing them, but my question is what can we do with the old ones ?