BioLite Charge 40 Portable Weatherproof 10400mAh USB Power Bank Stainless steel powerbank with 40 watt hours of power, 10400mAh, and 2 USB outputs (2.1 Amp and 1 Amp) Weatherproof and Dunk-proof - IPX6 rated, can handle unexpected rain or spills Durable Housing - Stainless steel body is thinner and stronger than plastic designs Lightweight - Weighs just 11.6 ounces Pick Your Power - The BioLite Charge Series is available in 10, 20, and 40 watt hour models to charge phones, tablets, and any other gear you need to keep your day going