TeckNet PowerTitan T2 19200mAh3-Port (5.4A Output) USB Portable Charger External Battery Power Bank Micro USB Charger with BLUETEK Technology for Apple iPhone, iPad and Samsung Galaxy and More Features cutting-edgeBLUETEK Technology which identifies and optimises USB power compatibility of devices from Apple, Samsung and many other devices to enable faster recharge rates of up to 4.0A (5.4A In Total) TeckNet Smart Display: TeckNet Patented LED display shows battery capacity up to 1% precision and Output charging rate up to 0.1A precision. Plug & Play: Simply plug in a device to automatically start charging without pressing any buttons, charging at 5V/3A. 93% Optimized Charging/discharging Efficiency: TeckNet Power Bank contain world class microchips. Theyre not only safer, but they also improve the charging conversion rate and stabilize the discharge voltage. 5-10% more than other brands Huge 19200Mah Capacity: Premium Li-ion battery cells from LG, provides almost seven iPhone 6s charges or five Galaxy S6 charges.