Quantity   Component name
1 × Lithium battery protection board http://www.ebay.com/itm/4A-5A-PCB-BMS-Protection-Board-for-4-Packs-18650-Li-ion-lithium-Battery-Cell-4S/271808179324?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D30543%26meid%3D88023fccfc4e4745bbc6f93c34abdd59%26pid%3D100005%26rk%3D2%26rkt%3D6%26mehot%3Dpp%26sd%3D381060996866&rt=nc