Lithium Iron Phosphate (LiFePO4) batteries have gained immense popularity in recent years due to their exceptional performance, durability, and eco-friendliness. One of the key aspects of LiFePO4 batteries is their voltage curve, which plays a crucial role in determining their overall performance and lifespan.

The voltage curve of a LiFePO4 battery refers to the graph that plots the battery's voltage against its state of charge. Specifically, it shows how the battery's voltage changes as it discharges from a full charge to a complete discharge. The voltage curve is a critical characteristic of a LiFePO4 battery, as it influences its cycle life, capacity, and overall performance.

A typical LiFePO4 battery voltage curve features four distinct stages:

1. Charge termination voltage: The point at which charging stops and the battery is considered fully charged. For LiFePO4 batteries, this voltage is typically around 3.65V.
2. Discharge cut-off voltage: The voltage at which the battery is considered completely discharged. For LiFePO4 batteries, this voltage is typically around 2.5V.
3. Self-discharge voltage: The voltage at which the battery's internal resistance increases, signaling the start of self-discharge. For LiFePO4 batteries, this voltage is typically around 3.2V.
4. Depth of discharge (DOD) voltage: The voltage at which the battery is fully discharged and needs to be recharged. For LiFePO4 batteries, this voltage is typically around 2.4V.

Understanding the voltage curve of a LiFePO4 battery is essential for optimizing its performance and extending its lifespan. By monitoring the battery's state of charge and preventing overcharge or overdischarge, users can ensure their LiFePO4 battery operates at its peak efficiency and longevity.	

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