Waterproof, dustproof, and capable of recharging a typical smartphone three times, the GOAL ZERO Venture 35 Power Bank is great for off-grid outdoor adventures and highly useful in the workplace, at home, or just out and about. Charge it up from an AC source (three hours) or compatible solar panel (about six hours), and the 9600mAh, 35.5Wh battery can in turn charge a smartphone three times, a POV camera six times, a headlamp seven times, and even a tablet, once. Ports include a 5V, 3A (15W max) USB Type-A output and a 5-12V, 3A, 18W regulated USB Type-C Power Delivery input/output. The built-in 50-lumen flashlight will come in handy time and time again. The Venture 35 is protected by a waterproof port cover and rubber sleeve, is rated IP67 dustproof, and waterproof to be submersible in three feet of water for a half hour with no damage. At 4.4 x 2.7 x 1.1", it's easy to stow in a bag, pack, or glove box, so you'll never be without the power you need.