Do You Know the Differences Between 30C and 40C Discharge Rates of Lithium Batteries ?
2025-04-08
The main differences between 30C and 40C batteries lie in their discharging capabilities or discharge rates. Here, C represents the charge - discharge rate, which is an indicator used to measure how fast a battery discharges. How to know the discharge rate of this battery ? For example, for a 12v battery with a rated capacity of 1000 mAh, if its discharge current is 30 A, then its discharge rate is 30C (30 A / 1000 mAh = 30C).
Discharge Capacity:
30C indicates that the battery can discharge at a current 30 times its rated capacity. For example, if a battery has a rated capacity of 1000mAh, it can discharge at a maximum current of 30A.
40C means that the battery can discharge at a current 40 times its rated capacity. Taking a 1000mAh battery as an example, its maximum discharge current can reach 40A.w
