ITEM NAME:1S 2.5A 3.7V Lithium Batterry Protection Board Polymer BMS PCM PCB Li-ion Module 1Pcx 1S 3.7V 2.5A Lithium Batterry Protection Board Polymer BMS PCM PCB Li-ion Module Only ship to the confirmed address provided by.Internal 3 phase overcurrent detectiton circuit (overcurrent 1,overcurrent 2,load short circuit). Short Circuit Detection State:external short circuit. P+:connect with charging/discharging port positive(charging port/discharging port common used).