iMarku 20000mah Ultra Slim Portable Charger for Apple, Android, MP3 Devices - Grey Ultra-slim external battery power bank, with reliable lithium polymer battery that ensures quality, and long working life. Ultra-High Capacity: it charges the iPhone 6 seven times, the Galaxy S6 five times or the iPad mini twice. Recharges in 10 hours with a 2 amp charger, phone chargers (generally 1 amp) may take up to 20 hours. Dual-port usb charger, it is universal fits for iPhone 6 5S/5/4S/4, iPad, iPod, iPhone,Samsung devices, HTC phones, tablet PCs, and MP3/MP4 players, etc. Greater versatility: It allows to charge your devices and charge itself simultaneously. Equipped with two output ports: 5V/2.1A, 5V/1.0A and one input port: 5V/1.2A Its Multi-Protect safety system ensures complete protection for you and your devices. 4 smart LED keep you updated as to the remaining capacity.