Fuhjythy 16x18650 Battery Storage Box PD QC3.0 Quick Charge DIY Power Bank Box Case 18650 Battery Holder Box Black

Note:Charging power depends on your device, for example: 9V-2A, if your device supports 9V-2A, then it automatically jump to 9V-2A, if not, it not jump With anti-reverse connection protection Normal Version Maximum Power: 5V-2.1A Quick Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A Note:Only 18650 flat-head batteries can be used, and the voltage is in line with 3.2V-4.2V. You need to use new batteries. Old batteries and damaged batteries cause failure to work, incorrect connection of positive and negative poles, and the first time you need to use the battery full