This is a simple battery holder that we use in some of our kits. What we like about these are the leads that come pre-attached, ready to be soldered to a APCB, or attached with your choice of connector. Two mounting holes to accept flush head screws. You can also use high adhesive double sided tape, or a glue gun to attach to your project or prototype. 3 cell 18650 Battery Holder Plastic Storage Box Case 3.7v Specification: Brand new Material: plastic Color: black, as picture shows Wire Length: approx 14cm size: approx 7.4x6x2cm(L x W x H)