MC0237W Features Quickly and effectively solves the low power problem for your phone while on-the-go Keeps your Sony XL39H (Xperia Z Ultra) 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 Sony XL39H (Xperia Z Ultra) Capacity 5000mAh Battery Lithium polymer battery Input 5V 500mA Output  5V 800mA Charging Time 4.8 hours Package Details Weight: 258.94 g Size: 24*12.5*2 cm