Generally, the life of lithium-ion batteries can reach hundreds of charge-discharge cycles, and such expressions are often seen in the instructions of batteries

and equipment. 1 charge-discharge cycle here refers to the process of using up the battery and then recharging it, rather than plugging in the charger and unplugging it once. 

Continuous deep charging and discharging of lithium-ion batteries has an impact on its life.

The main influencing factors are voltage and temperature. At 0 degrees Celsius, a lithium-ion battery with 40% remaining capacity will lose 2% of its capacity after one year of storage; at 40 degrees Celsius, a fully charged lithium-ion battery will lose up to 35% of its capacity after one year of storage. 

A good habit is to plug it in and charge it when you get the chance, and then unplug it when it's almost fully charged. The time for the battery to be fully charged should be minimized. 

Do not unplug the power supply after fully charged, the battery will remain fully charged, although it will not explode, but it will speed up the loss of battery capacity.