Feature: Size:186*80*44mm Normal Version Maximum Power: 5V-2.1A Wireless Charge Version Maximum Power: 5V-2.1A Wireless Charging :5W  Quick Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A Quick Charge + Wireless Charge Version Maximum Power: 5V-3A  9V-2A  12V-1.5A  3.4V-5.5V-5A Wireless Charging :10w Note:Charging power depends on your device, for example: 9V-2A, if your device supports 9V-2A, then it will automatically jump to 9V-2A, if not, it will not jump With anti-reverse connection protection Note:Only 18650 flat-head batteries can be used, and the voltage is in line with 3.2V-4.2V. You need to use brand new batteries. Old batteries and damaged batteries will cause failure to work, incorrect connection of positive and negative poles, and the first time you need to use the battery full Package Included:16*18650 Power Bank Case(not including the battery)