SMAKN Black Plastic Battery Storage Case Box Holder for 2 X 18650 with 6" Wire Leads New generic Plastic Battery Storage Case Box Holder for 2 x 18650 Black with 6" Wire Leads Brand new and high quality. Battery type: 2 pc 18650 Case Holder. 18650 Battery Holder Case with 6" leads for soldering / connecting. Takes 2 standard size 18650 batteries side by side to form a compact battery of 3.7V rechargeables.