Don't throw away that "dead" battery - renew it and save! Thomas Edison invented the principle that an alkaline battery could be renewed by simply cleaning the cells. This money saver regenerates batteries by releasing the potential that's already in the cell's internal structure. Works with alkaline, NiCad, NiMH and 9V batteries and has docks for 'AA', 'AAA', 'D', 'C' and 9V cells. Simultaneously renews 6 batteries. This item is a Customer Return. This is a customer return. Customer returned items have a 7 day return policy.