It's enough to recharge a tablet 2-4 times from flat. It can recharge phones more times still. But if that still isn't enough, ZeroLemon's SolarJuice lets you top up on sunlight, and right now, it has 16% off.

The ZeroLemon is not much bigger than a smartphone, but in addition to that significant capacity there is room for dual USB ports — 2A for quick charging, 1A for smartphone — for simultaneous charging. One side is covered in Grade A solar cells, which can fill the internal battery half full in eight hours of light. The outdoor theme continues with water resistance and shock proofing, plus an ultrabright flashlight for emergency lighting. Meanwhile, the power is stored in a polymer battery, which is incapable of overheating, and has a lifetime of over 1000 cycles.