Enerqizer's new "Energi To Go" product shown with the number of "e2 lithium" AA batteries (like the ones in front) required to equal the energy content of one "Medis 24/7 Power Pack". Based on Medis' claim of 10 full charges of a cellphone battery from one "24/7 Power Pack" and Energizer's claim "of one and a third" charges of a cellphone battery from two "e2 lithium" AA batteries using "Energi To Go".