Battery Charger for 50V 56V Series. 

Charge times of

2Ah 80% 24 mins 100% in 42 mins.

2.5Ah 80% 30 mins100% in 42 mins.

4Ah 80% 22 mins 100% in 44 mins.

5Ah 80% 30 mins100% in 57 mins.

Backpack Battery 80% 112 mins 100% in 168mins.