BioLite Charge 20 Portable Weatherproof 5200mAh USB Power Bank Stainless steel powerbank with 20 watt hours of power, 5200mAh, and 2.1 Amp USB output 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 5.8 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