Tesla trickle charging is used to compensate for the loss of capacity caused by self-discharge after a battery is fully charged.
Small current charging after the battery is full can keep the electrons flowing, make the battery more saturated, and also extend the service life of the electrons. Although the system power shows 100%, in fact, the battery is not really saturated. At this point, the remaining capacity can only be replenished by a tiny pulse of current, and this stage usually takes 30-40 minutes. All three stages are completed, and the battery can really reach a good state of saturation.
Trickle charging is used to make up for the loss of capacity caused by self-discharge after the battery is fully charged. Generally, pulse current charging is used to achieve the above purpose. In order to compensate for self-discharge, the continuous small current charging that keeps the battery in an approximate fully charged state is also known as maintenance charging.