Type Lithium Battery Charging Time 3 hrs Voltage 48 V Weight 1.7 kg (Only for reference, be subject to actual weight) Initial Capacity 4400 mAh Working Temperature -20℃~60℃ (Recommend 0℃~45℃ ) Charging Temperature 0℃~45℃ (Recommend 10℃~30℃ ) Relative Humidity of Storage 80±25% R.H.