Solove Titan A8 20000 mAh Premium Ultra Slim External Battery Pack / Power Bank / Portable Charger, Dual USB Outputs (2.1 A + 1 A), Polymer Battery, Aluminium Alloy Case, Universal Compatible with Most Electronics: iPhone, Android, Samsung, HTC, Nexus, BlackBerry, Huawei Smartphones, iPads and Galaxy Tablets (Crimson Red Metallic) REAL 20,000 mAh Capacity, charge standard cellphone 10 times, 93% conversion rate from power bank to actual devices, Best in Class Quality in Premium power bank market! Dual USB ports, Dual Outputs (2.1 A + 1 A). Universally supporting all cellphones, tablets or other devices with Micro USB interface. iPhone supported too but need extra cable. Polymer battery cells, same battery cell used for Mac Air. Ultra slim and 30% lighter than lithium battery. Aluminium alloy case, significantly improve cooling (always cool), solid build and ultra durable. Risk Free Design with Premium circuit, 9 protective features preventing overheating, overload, over output, over charging, over current, short, reset in unstable working environment, etc.