Start charged stay charged. I recently kayaked the Grand Canyon with 14 friends. Before the trip we charged two of the PowerKeep12 systems and ended the trip with charge on both systems!
It was nuts in Kona but I was able to enjoy some extra power with this device on race day during Ironman World Championships in Kona October 14. For anyone who’s used a charging block or external battery, this product is intuitive. The plugs, ports and instructions are very straightforward and familiar.