Beyond Capacity - A Key Indicator for Measuring The Performance of Cylindrical 3.7V Batteries

Beyond Capacity - A Key Indicator for Measuring The Performance of Cylindrical 3.7V Batteries

When choosing a cylindrical 3.7V battery, many users will first pay attention to its capacity (mAh). However, capacity is only part of the story. A truly high-quality battery is a masterpiece that perfectly balances multiple performance indicators.

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To comprehensively evaluate the advantages and disadvantages of a cylindrical 3.7V lithium battery, you need to pay attention to a more comprehensive "performance dashboard":

Internal resistance: This is one of the core indicators for measuring battery performance. The lower the internal resistance, the less heat the battery generates during discharge, and the higher the energy efficiency. Low internal resistance means that the battery can provide stronger instantaneous discharge capability (suitable for high rate applications such as power tools), while also having a longer cycle life.

Discharge rate: It indicates how quickly the battery can safely release energy. Usually measured in units of 'C'. For example, a battery with a capacity of 2500mAh can sustain a current of 2.5A if its maximum continuous discharge rate is 1C; If it is 5C, it can provide a current of 12.5A. High rate batteries are an inevitable choice for applications such as drones and high-performance power tools.

Cycle life: This directly relates to the long-term usage cost of the battery. It refers to how many complete charge and discharge cycles a battery can maintain its capacity at over 80% of its initial capacity. High quality power batteries typically have a cycle life of 500 or even 1000 cycles, ensuring the durability of the product.

Temperature performance and safety: Excellent batteries need to maintain stable operation over a wide temperature range. At the same time, safety is of paramount importance, which relies on multiple safety designs inside the battery cell, such as diaphragm materials (ceramic coated diaphragms can effectively prevent short circuits), safety valves (automatic pressure relief under abnormal pressure), etc., to jointly build a safety defense line.

Self discharge rate: This measures the rate at which the battery loses power when idle. Low self discharge rate means that the battery has a longer shelf life and can provide energy at any time when needed, reducing the hassle of frequent charging.

Conclusion: Understanding these key indicators can help you go beyond simple capacity comparisons and make wiser and more professional choices. And all of these outstanding performances ultimately rely on exquisite manufacturing processes and strict quality control behind them. In the final article, we will reveal how we ensure that every battery leaving the factory is trustworthy through full chain quality management.