C represents the discharge energy of the battery, which is called "discharge rate" in battery terminology, which is the multiple of the discharge current value divided by the battery capacity value. For example, if a battery has a capacity of 1.5Ah, 1c means 1.5A charge and discharge, 2c means 3A charge and discharge, and 0.5c means 0.75A charge and discharge; If the battery is 2Ah, 1c is 2A charging and discharging, 2c is 4A charging and discharging, and 0.5c is 1A charging and discharging. C represents the discharge rate, and a few c is the capacity multiplied by several. 1c discharge is 1 hour, 2c discharge is 0.5 hours, and 0.5c discharge is 2 hours (the larger the discharge current, the shorter the discharge time).
Batteries can be classified into high rate batteries, which can discharge at least 10c, while ordinary batteries can only discharge within 3c. In layman's terms, c represents the explosive power of the battery. High rate power batteries have a large instantaneous discharge current, which is particularly suitable for situations with high current and small battery size and light weight requirements, such as aircraft models and brushless motors, which are very violent.
The higher the discharge rate, the faster the electricity will be released. Generally speaking, batteries do not need to be discharged at high rates, which should be noted. Devices that truly require high rate discharge, such as aircraft models, require a momentary high current discharge during takeoff and sudden acceleration, which requires the support of high rate batteries.
So do you all understand? In fact, the higher the discharge rate, the better. The discharge rate of lithium batteries mainly depends on the equipment you use. There are many devices that do not require high rate discharge at all, so naturally high rate discharge batteries are not needed. Competition level car models, aircraft models, drones, etc. will all experience a high instantaneous current action, which naturally requires a higher discharge rate.
So generally, the number of C in a lithium battery is determined based on the actual size of the device. Generally speaking, when purchasing a high rate lithium battery, it is important to pay attention to whether your device can support such a high rate of current to avoid unnecessary losses.