1. Initial discharge stage
When the Bluetooth Headset Battery starts to discharge, the voltage is usually at a high level. In this stage, the battery can provide a relatively stable and high voltage output. For example, for a common lithium-ion Bluetooth Headset Battery, the initial voltage may be between 3.7 and 4.2 volts. Because the chemical reaction inside the battery is relatively active at this time, and the battery is fully charged, it can meet the higher power requirements of various functions of the Bluetooth headset (such as booting, Bluetooth connection, etc.). In this stage, the discharge curve of the battery is relatively flat and the slope is small, indicating that the voltage drops slowly. This is because when the battery is fully charged, the ion exchange between the electrode material and the electrolyte is relatively smooth, and it can continuously and stably output electrical energy to the outside.
2. Mid-term discharge stage
As the discharge continues, it enters the mid-term discharge stage. In this process, the battery voltage begins to gradually decrease. For a Bluetooth Headset Battery, the voltage may decrease at a relatively stable rate. At this time, the slope of the battery discharge curve begins to increase, but it still maintains a certain linear characteristic. In this stage, the battery mainly provides power for the normal use of the Bluetooth headset, such as music playback or call functions. Since the power demand of Bluetooth headsets is relatively stable, the battery maintains a relatively stable power output by adjusting the internal chemical reaction rate. However, as the power is consumed, the ion concentration inside the battery gradually decreases, and the efficiency of the electrode reaction also begins to decline, resulting in a gradual decrease in voltage.
3. Final discharge stage
In the final discharge stage, the battery voltage drops significantly faster. At this time, the battery power is close to exhaustion, and the internal chemical reaction is difficult to maintain the previous power output level. The Bluetooth headset may begin to have some low-battery prompts, such as sound prompts or flashing power indicator lights. At this stage, the slope of the discharge curve becomes very large and the voltage drops rapidly. This is because there are very few active substances available for reaction inside the battery, the migration of ions becomes difficult, and the battery can no longer provide stable voltage and power output. If you continue to use the Bluetooth headset, there may be a sudden power outage or abnormal function.
4. The impact of special situations on the discharge curve
Some special situations will also affect the discharge curve of the Bluetooth Headset Battery. For example, when a Bluetooth headset turns on a high-power function (such as high-volume playback, strong noise reduction, etc.), the battery discharge rate will increase, the slope of the discharge curve will increase, and the overall voltage will drop faster than in normal use. In addition, the ambient temperature will also affect the discharge curve. In a low-temperature environment, the chemical reaction rate inside the battery slows down, the initial voltage of the battery may decrease, and the voltage drops faster during the discharge process, and the discharge curve will shift toward the low voltage direction; in a high-temperature environment, although the initial performance of the battery may be good, the high temperature may accelerate the side reactions inside the battery, resulting in a shortened battery life, and the discharge curve will also show abnormal changes.
