What does the c value on the battery mean?And what effect does the C value have on the battery?

The c-rate is the governing measurement of what current a battery is charged or discharged at. The capacity of the lead-acid battery is expressed by the AH number measured at the discharge rate of 0.1C. For the lead-acid battery, the smaller the discharge current of the battery is, the more energy it can discharge. Otherwise, the larger the discharge current is, the smaller the capacity will be comparing to the nominal capacity of the battery. In addition, the larger charge and discharge current will have impact on the life span of the battery. Therefore, it is recommended that the charge discharge rate of the battery should be 0.1C, and the maximum value should not exceed 0.25c

Battery charging and discharging current (l) = nominal capacity of battery (ah)* C value