When charging and discharging lithium batteries, voltage is used as a criterion. High and low voltages indicate that the battery has been overcharged or discharged. Both of these conditions will damage battery life. Therefore, the high and low voltage range of lithium batteries is used as the standard for charging and discharging.
The charging voltage of popular single-cell lithium batteries on the market is 4.2V, and the discharge voltage is generally 2.7V, and some are 2.5V. < /p>