This battery box holder fits for 18650 batteries.

Simple DIY recharge power supply.

You could use this case with your own battery to form power supply system. 

Specifications:

Item Type: 18650 Battery Holder Box 

Material: Plastic + Metal

Color: Black

Type:1 slot,

Size: 7.5×2cm(1 slot)

Fit for: 18650 3.7V battery (Not Included)

Quantity: 1 PC (other accessories demo in the picture is not included)

Note: 

1.Transition: 1cm=10mm=0.39inch

2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.

3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

4.No retail package