It is believed that for the longest life of a lithium-ion battery, it should be charged to a maximum of 80%. But 80% of a modern smartphone is actually 100% and the smartphone recharges the battery. This is easy to verify by monitoring the battery voltage. It will also help you to know that your smartphone turns off when the charge indicator is still tens of percent due to a worn battery. Knowing how many volts the battery produces at a certain moment, you can draw conclusions about the health of the battery.
Understanding the battery voltage on your Android smartphone can be useful for monitoring and maintaining its health. Battery voltage shows the battery’s charge level and helps users charge the device properly, avoiding overvoltage that shortens battery life or causes problems such as overheating.
For example, you may be surprised that your smartphone recharges the battery. The maximum voltage for a long service life of a lithium-ion battery is considered to be 4.20 Volts. However, modern smartphones prefer to get more capacity at the expense of battery life, so phones charge the battery up to 4.4 volts.
When your smartphone shows 80% charge, it means that the battery voltage is 4.2 volts – a voltage that gives the optimal balance of capacity and battery life.
If you want to follow the recommendation to charge the battery up to 80%, which corresponds to a voltage of 4.0 volts, you should stop charging your smartphone when the Android charge indicator shows 70%.
To monitor battery voltage in real time, use the Battery Voltage Display utility https://tinyurl.com/batteryvoltagedisplay. This program outputs a constant message that displays the battery voltage in real time. You can read your smartphone’s battery voltage at a glance at any time by looking at the numeric voltage values ??in the Android status bar.
