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 a charge on both systems! This product is durable, lightweight and easy to use.
It was nuts in Kona, but I was able to enjoy some extra power on race day with this device during the Ironman World Championships this October. For anyone who’s used a charging block or external battery, this product is intuitive.