FEATURES of the Brunton Hydrogen Reactor Portable Fuel Cell Live Swappable Energy ? Just exchange empty for full and keep charging without waiting, ideal for disaster readiness; solid state with no natural discharge Environmentally Safe ? No toxic chemicals. Recharged from water Hydrogen Power ? Lock rechargeable Hydrogen Core to Hydrogen Reactor for hours of power off-the-grid and on-the-go 2 Hydrogen Cores ? Each is Capable of 6 iPhone recharges; 5v 2amp output Great to power USB devices like smartphones, tablet computers, UV water purifiers, rechargeable lights, portable game consoles, GPS transceivers and more SPECIFICATIONS of the Brunton Hydrogen Reactor Portable Fuel Cell INCLUDES 2 HYDROGEN CORES Equal to 30 AA Batteries SPECS ? 13.5 x 7.3 x 3.4 cm; 146g Reactor, 242g with Hydrogen Core; Solid state with no natural discharge. OUTPUT ? Standard USB