Powerful Capacity Powerful capacity of 10400m Ah lets you charge a smartphone 3-5 times, keeping your devices running all the time. Simultaneously Super-fast Charging Dual USB (Universal Serial Bus) ports (5V/2A & 5V/1A) allow for charging two devices simultaneously. Built-in special circuit provides full speed for your smartphones. Reliable Power TL-PB10400's multiple protections of short circuit, over-voltage, over-current, over-charge, over-discharge, & over-heating ensure safe & reliable charging to avoid any potential harm to your devices. High Energy Efficiency Rate Combining high quality circuit, TL-PB10400 greatly reduces unnecessary energy loss while charging, ensuring up to 90% energy efficiency rate. So under full capacity, it can charge a smartphone 3-5 times, ideal for extended use of mobile devices. Universal Compatibility Compatible with almost any smart devices like iPhones, iPads, Android smartphones & other 5V input USB (Universal Serial Bus)-charged devices, simply use the cable supplied with your device. Smart LED Indicator Four LED lights work as charge indicators to show battery level or charging status use of mobile devices. Practical Flashlight Built-in flashlight comes in handy for in-house & offâroad activities.