Capacity:20000mAh/74WH MAX Simultaneous charge and discharge: Yes Lifespan: Charge-discharge cycles >=300 times Input: DC5V 2.1A MAX Size: L160*W80*H22.6mm Verification: FCC\CE Compatibility: All intelligent cell phones and 99% of tablets Circuit Protection: Yes Power bank conversion rate: about 85% Output: USB1--DC5V 2.1A; USB2--DC5V 1A Weight:about 445g / 15.7ozs Charging time: about 13 hours (10.5W) Feature: 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. 20000mAh, 300+ recharge cycles over the life of the battery.It will never let your phones run out of Juice when you outside. 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. Humanized Function: 4 LEDs to indicate charge levels, enter power saving mode after 3 minutes. Box Contents: 1x 20000mAh Battery Pack 1x 19.68 Micro USB charging/data cable 1x User Manual