TeckNet PowerTitan T1 12800mAh 3-Port (4A Output) USB Portable Charger External Battery Power Bank USB-C 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 3.0A (4.0A 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. 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 USB C Compatibility: In addition to standard functionality, Eah USB port makes it compatible with the new MacBook, charging at 5V/3A. Huge 12800Mah Capacity: Premium Li-ion battery cells from LG added an extra 5 full charges to iPhone 6, 3-5 full charges to Samsung Galaxy S4, 1.5 charges to Apple iPad Mini