18650 Battery In-Series 4S Lithium Cell Holder with Wire This 18650 battery cell holder is used to carry/store/keep your lithium ion battery in perfect and safe position. It comes with a single mounting hole in the center of plastic case which can help us in mounting it on any surface using screws of 3mm. It also have two leads or connecting wire of red and black color. Made for 18650 batteries. Four Cell Holder 18650×4