Estarli
e20 Operating & Maintenance Instructions
2.3 Recharging
The charging port is located under the saddle, covered
by a dust and moisture cover.
Remove the cover and plug in the charger, replace the
cover when charging is complete.
If you want to charge the battery separately,
unscrew
the connection port to the controller, loosen the seat
clamp and remove the seatpost in its entirety.
Repeat the above steps to replace and connect it.