Applications: toys, electronic DIY, bread board power supply, LED lighting power supply, low voltage electrical equipment, remote control, radio, quartz clock, wireless keyboard, electronic calculators, doorbell, mobile digital recorder, remote control, radio, quartz clock, electronic calculators, doorbell, tape machine, electric toys, children/adults wireless mouse/keyboard, strong light flashlight, electric shavers, camera flash, electric toothbrush, game handle, strong light flashligh Feature: 1. AA Battery Holder comes used with snap connector lead wire, easy to install and connect. 2. Thicken Plastic Shell and nickel-plating copper contact, sturdy and durable. Specification Material: plastic shell, nickel plated copper conductor, nickel-plated steel spring Size: 57 * 32 * 29mm Package Include: 6PCS 4 x 1.5V AA Batteries Battery Holder