I don't have a battery, but the reality is unless you vcan get a battery at about 1/3 of new, I wouldjust buy a new one, since life and shot capacity is a direct product of age, number of cycles, and how often it was charged or totally depleted. It is like buying a used car battery with no idea of installation or manufacturing date. So, the smartest move is to buy a used adapter, since it will perform and have same life as new, and then get one or two new batteries.