Normal Version Maximum Power: 5V-2.1A Quick Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A 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 Colour:black Material:plastic Size:186 x 80 x 44mm Package Contents: 1 x 18650 Power Bank Case(Quick charge version,not including the battery) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.