Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of battery Balance protection, battery voltage balance, make battery life longer Six layers of security protection, a new integrated solution Wide range of applications: Compatible with most power tools on the market: electric drills, electric scissors, Ota can street lights, electric vehicles, etc. Model: -729C Compatible strings: 4 strings of ternary Discharge current: 10A Charging current: 2A Overcharge protection: ternary 4.25V0.025V adjustable Over-discharge protection: ternary 2.75V0.050V adjustable Size: 35 x 35 x 13mm Other functions: with temperature control Applies to: for Power Tools Material: PCB+Metal colour: green Package Contents: 1 x Battery protection board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.