This is a Black Plastic Storage Box Case Holder for Battery 2 X 18650 Cell Box, with DC Power Plug. The 5-inch cable is terminated with a standard 5.5×2.1mm, centre positive barrel jack connector. The connector mates with the barrel jack on the Arduino (among a number of other products) allowing you to easily make your project battery powered. 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 holdercase is perfect for the devices need a 7.2V external battery. Features : Holds two 18650 batteries. The standard 5.5 x2.1mm barrel jack at the output. Easy install, convenient to use. High-quality plastic material. Package Includes : 1 x 2 X 18650 Black Battery Holder with DC Power Plug SKU: PGI-00326620 Categories: Battery Holder, Prayog Blaster