Dark Energy Reservoir

Carrying around a large capacity backup battery to extend the life of your power-hungry smartphone need not overfill your pockets or weigh you down. Case in point: the Dark Energy Reservoir. This charger is downright lean when compared to some of its bloated competitors yet boasts a whopping 8,000mAh of charge capacity, enough to refill most smartphones three to five times over. It’s also lightweight at a hair under 6 ounces, boasts two USB ports — one 1.0A for smaller devices and another 2.1A for tablets or for faster charging — and comes in two colors: black and white.

Find it at Amazon – $90