ITEM NAME:3pcs 1S 3.7V 2.5A PCB BMS Protection Board for 18650 Li-ion Lithium Battery B FT.3pcs x Protection Board. Overcurrent detection current: 5A. Main IC using original "precision" imported components. B+ connect to battery+. B- connect to battery-. P+ for battery output input +. P- for battery output input -.