Suitable for: 1.Suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, no size limit) 2.Suitable for electric drill with starting current below 120A and power below 260W. Charging voltage:12.6v ~ 13.6v Over Charge voltage:4.25±0.05v Over Discharge voltage: 2.5v±0.05v Continuous discharge current (upper limit): 60A (if the cooling environment is not good, please reduce the load current ); Continuous charge current (upper limit): 10A