What does C-Rating mean

C coefficient


The Charging current and the Discharge current a battery corresponds to the current strength with which it is charged or discharged.

It is often referred to as C coefficient designated. The charging and discharging currents are related to the maximum capacity of a battery in order to be able to compare different "large" batteries more easily. A coefficient of 1C means that a battery is fully charged or discharged within 1 hour, a C coefficient less than 1 that it lasts longer than 1 hour and a C coefficient greater than 1 that it is less than 1 hour lasts.

Example: If a battery with a nominal capacity of 2,000 milliamps (mAh) is discharged at 1C, it will deliver a constant current of 2,000 milliamps (mA) for one hour. If the same battery were discharged at 0.5C, it would give off 1,000 mA for two hours. At 2C it would deliver a constant 4,000 mA for 30 minutes.

It is common, instead of 1C or a C coefficient of 1, to use a 1-Hour discharge to speak. A 2-hour discharge corresponds to 0.5C and a 10-hour discharge to 0.1C. This also applies to the charging of batteries (xHour charge).

The short notation xC is not to be confused with the short notation for the unit of measurement Coulombx C.