As a battery technology expert with extensive knowledge in the field, I am well-versed in the specifications and terminologies used to describe various battery types and their performance metrics. When it comes to the term "25C" on a battery, it is crucial to understand that this refers to the battery's discharge rate, which is a measure of how much current the battery can safely deliver over a given period.

The "C" in the term "25C" stands for "C-rate," which is a standardized method for expressing the charging and discharging rates of batteries. It is defined as the battery's capacity divided by the current at which it is being charged or discharged. For example, if a battery has a capacity of 2000mAh and is being discharged at a rate of 200mA, the discharge rate would be 10C (2000mAh / 200mA).

The "25C" rating on a battery indicates that the battery is designed to safely discharge at a rate that is 25 times its rated capacity. This is the nominal discharge rate, which means it is the standard operating condition under which the battery is expected to perform without any issues. It is important to note that this is not the maximum discharge rate; batteries can often handle higher discharge rates for short periods, known as the maximum burst discharge rate.

In the context of LiPo (Lithium Polymer) batteries, which are commonly used in various applications such as RC vehicles, drones, and other electronic devices, the discharge rate is particularly important. LiPo batteries are known for their high energy density and ability to deliver high current, which makes them suitable for applications requiring quick bursts of power.

The reference to "25C to 40C" on a battery case implies that the battery has a nominal discharge rate of 25C and can handle a maximum burst discharge rate of 40C. This means that while the battery is designed to operate safely at 25C, it can momentarily handle a higher discharge rate of 40C without causing damage to the battery or reducing its lifespan significantly.

It is essential to use batteries within their specified discharge rates to ensure safety and longevity. Exceeding the discharge rate can lead to overheating, reduced performance, and in extreme cases, damage to the battery or even a risk of fire or explosion.

In summary, the "25C" rating on a battery is a critical piece of information that informs users about the battery's safe operating discharge rate. It is part of a broader specification that includes the battery's capacity, voltage, and maximum burst discharge rate, all of which are crucial for selecting the right battery for a specific application and ensuring safe and efficient operation.

read more >>

A 4S LiPo would therefore supply 14.8V. Apart from the cells, a discharge rate is defined by the letter 'C'. Most batteries cases say something like "25C to 40C" discharge rate. This means that 25C is the nominal discharge rate and 40C is the maximum burst discharge rate.read more >>