Strong Compatibility: IR-charge Tech makes strong compatiblity, it is compatible with most cell phones. High Capacity: Grade A Cell Used to assure you a highest quality and reliability. 10400mAh, 500+ recharge cycles over the life of the battery.It will never let your phones run out of... Strong Compatibility: IR-charge Tech makes strong compatiblity, it is compatible with most cell phones. High Capacity: Grade A Cell Used to assure you a highest quality and reliability. 10400mAh, 500+ recharge cycles over the life of the battery.It will never let your phones run out of Juice when you are outside. Humanized Function: With 4 LEDs to indicate charge levels, enter power saving mode after 3 minutes. Ergonomic and Delicate Design: The R9 fillet and slim feature ensures a more comfortable grip. Portable and light design makes it more convenient to carry in your pocket or purse. Charging while Discharging: Special design allows charges the device while being charged, it saves your time.For good performance, please pair using your original USB cable to charge the device. For charging the battery, please connect the micro usb cable with battery to PC or DC 5V USB charger. DC USB charger is not included. Light and Small: - Dimensions: L138*W62*H21.5mm - Weight: 296g/10.44ozs - it is very convenient to take out High Capacity - Long Lasting: - Capacity: 10400mAh - Type: Lithium ion (Li-Ion) - Input Charging Time ~12 hrs - Life Cycle > 500 Times - Input: DC5V 3A MAX Max - Output: USB1:DC5V 1A USB2:DC5V 2.1A Box Contents: - 1x 10400mAh Romoss 4 Heart 10400mAH Battery Pack - 1x Romoss Micro USB charging/data cable - 1x User Manual