Forgive me if my EE knowledge is old and rusty, but isn't an anode required for a battery to function? You have to be able to harvest a voltage differential, an

Forgive me if my EE knowledge is old and rusty, but isn't an anode required for a battery to function? You have to be able to harvest a voltage differential, and to do that you must have an anode and a cathode. Perhaps they meant there wasn't an anode that gets degraded by use?