Since energy from solar collection was free and plentiful, the value of electricity was not in the joules, but in the units that carried them. The Volta-cell is coveted due to its rapid reload time compared to its predecessors. The newest generation of the commercial Volta-cells was invented by the ultra-wealthy man known only by one name: Inducious. The glory time of his corporate control was over, resulting in power-cells exclusively existing on the second-market. This meant that the Volta-cells carry a much greater value post-Decentralization, since manufacture has all but stopped.
An additional feature of Volta-cells vs other power-cells is that unlike conventional deep cycle batteries, Volta-cells have a lifetime of rechargeability.
Volta-cells are primarily used to power energy weapons, but can be used to power a large number of conventional energy-demanding devices.