MC0234W Features Quickly and effectively solves the low power problem for your phone while on-the-go Keeps your HTC One max (T6) always powered Protects your cell phone from scratches and dust Can conveniently carry cards in the built-in card slots Supports over-current， over-voltage， over-charge， over-discharge and short circuit protection Lightweight and compact size for ease of carrying A must-have item for travel and going on business General Specs Compatibility HTC One max (T6) Capacity 4200mAh Battery Lithium polymer battery Input 5V 500mA Output  5V 800mA Charging Time 4.8 hours Package Details Weight: 190.46 g Size: 24*12.5*2 cm