The Energy Pack BPR88 is equipped with high capacity 8,800 mAh Lithium-ion rechargeable battery, it provides sufficient energy to charge your tablets and smartphones. Featuring a maximum output current up to 3.4A, it gives you the flexibility to charge two devices simultaneously. The Energy Pack BPR88 is compatible with the most smartphones, tablets and other USB-powered devices such as iPhone 5s, iPod touch, Samsung GALAXY S IV / Note III, Sony Xperia Z1 and HTC One etc. With the patented Smart Power Detection technology, you can check the remaining battery capacity at a glance without pressing any button. Simply shaking and tapping the charger, the LED lights will display the remaining battery capacity.