Charging Times The size of the battery (Ah) and its depth of discharge (DOD) greatly affect its charging time. The estimated charging time shown below is based on an average depth of discharge 50% to a fully charged battery and is for reference purposes only. Actual data may differ due to battery conditions and temperature. Charging Steps Optimal Battery Capacity Range(Ah) Battery Capacity (Ah) Charging Time (h) 12V/3A 6V/8A 12V/8A 15-260 15 3.1 1.2 1.2 50 10.4 3.9 3.9 100 20.8 7.8 7.8 150 31.3 11.7 11.7 260 54.2 20.3 20.3