The ideal condition for lithium-ion battery is to use between 85% and 40%.
It is best to avoid keeping this battery fully charged.
If charging can be completed in less than 1 hour of boarding, there is almost no state of full charge.
So it's good to use a timer to fully charge the battery just before departure.
Assuming that my bike can run for up to 60km, it can be stored if it has run 9 to 36km from full charge.
If I drive more than that, it is expected that the battery level will be less than 40%, so it is better to charge it.
If you keep data on the time required for charging as shown below, you can use the timer to charge properly.