2nd Generation Astro E5 Portable Charger External Battery Power Bank A power plant for your palm or pocket. PowerIQ  Detects your device. Delivers the fastest charge. Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge. Enormous Capacity Enough power to keep you going for days. Charge an iPhone 5s over seven times, a Galaxy S5 four times or an iPad Air more than once. Our Most Compact Yet Using ultra-high density cells, we've packed in 25% more power than the same-sized Astro E4 to produce our most compact battery yet. Superior Quality We use only premium LG battery cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety. World Famous Warranty At Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support. For Optimal Use: • Use the included cable, your original cable or a third-party certified one (such as MFi). • Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the LG G4 / G2, iPod nano, iPod Classic, HP TouchPad, Asus tablets and some GPS and Bluetooth devices.  • Remove film before use. • To give your Astro E5 the fastest, safest recharge, use an Anker USB charger. Using an ordinary phone charger may cause overheating.