... (24V3.0A) is Intelligent 3-Phase Charger for power battery Battery Charger Output Charging Current (limited current), Rating charging current ... red (indicates bulk charge) 3rd step, LED → green (means battery is ready to use and charge turns to float charge ... Stock Environment,Temperature , -25°C----+70°C,Humidity,5% - 90%Work Environment,Temperature,- 0°C----+40°C, Humidity,5% - 90% Battery charger