원통형 배터리 접점, 클립, 홀더 및 스프링 The Protected Battery Boards (this is a pair of 2) give you peace of mind when leaving MNT Reform uncharged for a longer time. Connector: Molex Pico-Lock with 5 pins. Protects 4x 18650 LiFePO4 cells from over- and undervoltage.