It can also replace many damaged battery holders of electronic devices. Easy to connect: 18650 battery case with 5.5 x 2.1mm male DC plug wires for easy connection and no welding required. With ON/OFF switch, you can shut off the power when not in use Package Includes: 4pcs 18650 battery holder case with DC Plug and ON/OFF Switch and Cover, 2pcs Plastic Battery Storage Box, 16pcs Screws, 1pc Screwdriver. Power Sources Box 18650 Battery Holder 8 Slot Easy Swaps DIY Power Supply Holder DIYmalls 2 Cell 3V AA Battery Holder Case Storage Box With ON/Off Switch Alligator Clip Wire Cable 130mm (Pack Of 4 18650 Battery Charger Wide Application: It is also very suitable for Arduino boards microcontrollers, LED projects, toys and so on. The package includes: 12 pcs 1 Slot 18650 battery holder, 2 pcs Plastic Battery Storage Box, 24 pcs Screws, 1 pcs Screwdriver. Quality Material Easy to Use: 18650 battery holder with spring clip design, you can easily put the battery in it. Easy to Connect: 18650 battery holder with 5., 5 x 2., 1 mm Male DC plug wire leads for easy connecting and no welding is required.