Lithium battery discharge needs to pay attention to several points:

Lithium battery discharge needs to pay attention to several points:
First, the discharge current should not be too large. Excessive current will cause internal heating of the battery, which may cause permanent damage. On mobile phones, this is not a problem, so you can ignore it.
Second, it must not be over-discharged! Lithium batteries are most afraid of over-discharge. Once the discharge voltage is lower than 2.7V, the battery may be scrapped. Fortunately, a protection circuit has been installed inside the battery of the mobile phone. Before the voltage is low enough to damage the battery, the protection circuit will work and stop discharging. The larger the battery discharge current, the smaller the discharge capacity and the faster the voltage drop.