The BioLite Charge20 features an ultrathin and durable stainless steel design to bring you power that crosses over from the backcountry to everyday carry. The silicone gasket makes the Charge 20 dunkproof, ready for spills or unexpected rain. The Charge 20's 5200 mAh power supply can charge 2 full phones, lights, fitbits, or any other gear you need to keep your day going.