Can electric key batteries charge cell phones?

Lithium batteries are more afraid of overcharging than of excessive discharge. However, lithium batteries do not have a memory effect and can be recharged at any time. Do not charge until the battery is completely exhausted, as this could easily damage it due to over-discharge. Do not discharge with high current. In places with steep slopes, it is best to use pedal assist to avoid excessive battery current. affects battery life. For the same reason, avoid exceeding the load specified in the instructions. Chargers usually have full protection, which usually does not cause overcharging. However, late at night the load on the power grid is very light and the voltage rises very high. It is easy to exceed the full shutdown voltage set by the charger. the battery will continue to be charged. This can easily causeoverload, so the charger should be unplugged late at night.