??This box holder is easy installation and taking， perfectly designed for 18650 battery with 4 series items.

Feature:
Perfect box holder for 18650 battery.
Easy to form your own power supply system.
DIY power supply with 4×18650 series batteries.
Easy installation and taking.
High quality and durable in performance.

Specifications:
Battery Type: 18650
Connection: Series
Color: Black
Item Size: 8.0 * 7.5 * 1.7cm
Item Weight: 26g

Package information:
Package Size: 8.5 * 8.0 * 7.5cm / 3.35 * 3.15 * 2.96in
Package Weight: 130g / 4.59oz

Package list:
5 * 4×18650 series battery holder