What’s the problem with Xiaomi Electric Scooter 4 Pro Plus series not charging?

Possibly due to the following reasons:
(1) Charger malfunction: Connect the charger to the power source without attaching it to the vehicle. Observe the charger's indicator light. If it doesn't light up or shows a red light (it should normally be green), it indicates a charger malfunction and a new charger is needed.
(2) Battery over-discharge: If the vehicle has not been used or charged for an extended period, over-discharge of the battery may occur. Connect the charger and attempt to charge to activate the battery. If activation is unsuccessful, it suggests severe over-discharge, requiring repair.