Basic info:
Type: Battery Storage Box with Pin
Material: ABS and Metal
Battery type: 18650
Colour: Black
Style: 4 Slots 18650 Battery
Size:79 x 22 x 78mm/ 3.11" x 0.87" x 3.07"

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 three compartments or chambers for holding three 3.7V battery. It is easy to solder and conduct electricity!
Function: Keeping your standard or rechargeable batteries together and safe.

Package including:
4pcs 18650 Battery Storage Case 4 Slots with Pin

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.