Charge times of

2Ah 80% 24 mins 100% in 42 mins.

2.5Ah 80% 30 mins100% in 47 mins.

4Ah 80% 48 mins 100% in 88 mins.

5Ah 80% 60 mins100% in 89 mins.

Backpack Battery 80% 225 mins 100% in 336 mins.