The 4 x 18650 battery holder case box can hold 4 pieces 18650 batteries. The case box can keep your batteries organized and protected. The holder case is designed with leads for easy to solder and connect. This battery holder case is perfect for the devices need 14.8V external battery. - Color: Black - Material: Plastic - Voltage: 14.8V - Holds 4 x 18650 batteries - Great to be used as a perfect external power source