It is not recommended to use an auto battery charger to charge an electric scooter. Auto battery chargers are designed for lead-acid batteries, while electric scooters typically use lithium-ion batteries. Using an auto battery charger on a lithium-ion battery can damage the battery and void the warranty.
For best results, use the charger that came with your electric scooter. If you need a replacement charger, be sure to get one that is specifically designed for your scooter model.