There are three types of battery, the chemical battery, the fission battery (about twice the capacity of a chemical) and fusion battery (about twice the capacity of the fission). Multiple devices can all be run off the same battery.
External batteries or personal power supplies can be recharged with power cells, disposable storage units that transer their potential energy to any battery. The resulting catalytic reaction restores 1/3 of any battery’s total capacity. These are stockpiled at every WEC location.