21x18650 Battery Storage Box Dual USB Charge18650 Battery Power Bank Case Shell with LED Light

Item: No Welding DIY Detachable Power Bank Case
Size:170*84*62mm
Charge Power: 5V-2.1A
Can install 21PCS 18650 flat head batteries(Batteries not include)
With LED Lighting
Color: black,white,green,blue,red
Note:
1, The positive and negative poles need to be seen clearly before installation.
2, Some power bank case supply displays "0" after the battery is installed, and needs to be charged to activate the battery

Package Included:
Power Bank Case (Batteries not include)

Note:
1, Don't use pointed batteries. Batteries with damaged appearance are not use.It is not recommended to use the battery with high internal resistance, long storage time and many times of use.
2, 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.