If your bike is not charging, please check for the following symptoms:
1. Charger showing constant green light when plugged in = Bike repair needed
2. Charger goes from green to red = Bike repair needed
3. Charger light constantly switching between green and red = Bike repair needed
4. No light on the charger at all = Charge is broken
You only need a new charger if your charger is showing symptoms of point 4. Otherwise a new charger will not solve the problem.