Feature:T21: output/input maximum power: 5V-2.1AT21-QI: output/input maximum power: 5V-2.1A wireless charging 5w (watt)T21-PD: output/input maximum power: 5V-3A 9V-2A 12V-1.5AT21-PD-QI: output maximum power: 5V-3A 9V-2A 12V-1.5A 4.5V-5A 5V-4.5A wireless charging 15wT21-PD-QI: input maximum power: 5V-3A 9V-2A 12V-1.5ANote: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 jumpWith anti-reverse connection protectionNote: 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 fullPackage Included:1*18650 Power Bank Case(not including the battery)

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