The energy source called this cell uses 2 chemicals & an electrolyte to get continuous power instead of storing a charge
The stored chemical energy in the battery converts to electrical 
energy, ... As a result, the two electrodes have different charges: The anode ... 
plug the battery into a power source, the flow of electrons changes direction,... [DOC] [TLE] Lesson 3  Battery and Fuel Cell Technologies - Clarkson University [PAR] 2.