1. The problem statement, all variables and given/known data To recharge a 5V battery, a battery charger must move 7x10^6 C of charge from the neg. to pos. terminal. How much work is done by the charger in joules? 2. Relevant equations QV=U 3. The attempt at a solution If the battery needs to be recharged, isn't the potential difference initially zero because there is no charge on either of the terminals to begin with? Therefore, isn't this similar to a parallel plate capacitor where U=(.5)QV?