The left panel shows a typical lithium-ion battery, where a single charged metal ion (Li⁺) migrates in the internal circuit, and a corresponding electron streams in the external circuit. By comparison, the VersaVolt battery (right panel) takes advantage of a double-charged metal ion, balanced by the transport of two electrons in the external circuit. This means that two times the electric charge moves in the VersaVolt battery, which is equivalent to two times the current. This two-electron transfer also results in double the power and energy.