TeckNet&reg; POWER BANK Mini 3000mAh USB External Battery Pack- Ultra-Compact "Lipstick" Size Mobile Phone Portable Battery Charger for iPhone 5 4S 4 3GS, iPod (Lightning Cable not Provided for iPhone 5) / Samsung Galaxy S4 S3 I9300, S II I9100, I9000, Galaxy Nexus, Galaxy Note / HTC: One Series, Sensation G14 XE XL, Radar, EVO 3D, EVO 4G, Inspire 4G, Vivid 4G, Incredible 2, Rezound, Thunderbolt / Motorola Triumph, Droid / LG Optimus / Nokia N9 Lumia / Blackberry Z10 / Sony Xperia Z - Silver Cutting-edge BLUETEK technology identifies compatibility with Android, Apple and other devices to optimise charge speeds of up to 1A 93% charging efficiency: This discreet power bank boasts 93% charging efficiency and an energy efficiency rate 5-10% above other 3000mAh batteries 3,000mAh capacity adds more than a full charge or 10 hours of additional talk time. Most phones will benefit from 1 full charge or 98+ hours of audio playback Compact and lightweight design (111 x 24 x 24mm) fits easily into your pocket or bag. Powerful, extremely durable 3W, 150 Lumen LED torch Constructed using Samsung cells and premium quality microchips. 3 LED power status indicator system: red (&lt;30%), yellow (30%-60%), green (60%-100%)