If you are experiencing an issue with your V40 scooter where it can only be turned on with a charger, there are a few things you can try to troubleshoot the issue.

Firstly, it's important to check if there is any water ingress into the scooter. If there is, this could be causing the issue and you will need to replace the controller for the water ingress. This is a common issue with electric scooters, especially if they have been ridden in wet conditions or stored outside in the rain.

If water ingress is not the problem, the next step is to replace the battery. A faulty battery can cause the scooter to only turn on when it's connected to a charger. Make sure to purchase a high-quality replacement battery that is compatible with your V40 scooter.

If replacing the battery does not solve the issue, the next step is to replace the controller. The controller is responsible for regulating the power flow to the motor and other components of the scooter. If it's faulty, it can cause the scooter to only turn on when it's connected to a charger.

If you are unsure about how to replace any of these components or need further assistance, it's always best to contact our Customer Support Team or authorised service location. They will be able to diagnose the issue and provide you with the best solution to get your V40 scooter up and running again.