ITEM NAME:Lithium LiPo Cell Li-ion BMS Battery 18650 Protection PCB 7.4V Q6E8 Board 7 B0J4 Description&Preview.1 x 2S 7A 7.4V 8.4V Lithium LiPo Cell Li-ion BMS Battery 18650 Protection PCB Board. The lithium battery protection board properties Connect the battery 1 to the connection point before the battery 2;.