Basic info:
Type: Battery Storage Box with Pin
Material: ABS and Metal
Battery type: 18650
Colour: Black
Style: 2 Slots 18650 Battery
Size:42 x 22 x 90mm/ 1.65" x 0.87" x 3.54"

Description:
Advantage: The battery holders are made of high quality material. Small size, easy to carry. Easy and convenient to use.
Feature: The battery holder has two compartments or chambers for holding two 3.7V battery. It is easy to solder and conduct electricity!
Function: Keeping your standard or rechargeable batteries together and safe.

Package including:
5pcs 18650 Battery Storage Case 2 Slots with cover

Prompts:
Batteries Not Included.
You had better use consumer type 18650 cell with button cap or sharp cap to get good electricity conductivity of positive and terminal of box.