Enough power to charge up an iPhone 8 nearly twice. 2A of output can charge even larger devices at fast speeds. Using the latest technology we've created one of the smallest and lightest 5,000mAh cylindrical power banks on the market. Over heating, over voltage, short circuit, over current and over charge protection make Tech Charge a brand that you can trust. Automatically detects the device connected and only delivers the right amount of power that the device can handle.