when the battery lecel remains around 20% or....... , you should charger the cellphone battery......, the cable of the charger to the phone then, plug the charg

when the battery lecel remains around 20% or....... , you should charger the cellphone battery......, the cable of the charger to the phone then, plug the charger to the power supply. when the battrey is fully charged, ...... the charger from the supply before removing it from the phone.