ElectricScooterParts.com Support Center

When the red light on a battery charger blinks that is a sign that something is wrong with either the charger or battery pack. Since in this case the red light does not blink when the charger is plugged into the wall and not plugged into the hoverboard that indicates that the battery charger is most likely working properly and that the problem is most likely with the charger port or battery pack.

A battery charger with blinking red light when plugged into the wall only could indicate one of these problems:

• A faulty battery charger (replace charger).
  

A battery charger with blinking red light when plugged into the wall and scooter could indicate one of these problems:

• The charger port is wired incorrectly to the control module or battery pack and has reverse polarity or a short circuit (replace charger port).
•  The battery pack has loose or incorrectly wired connections (check battery pack to control module connection).
• The battery packs Voltage it too low which indicates to the charger that it is faulty and can not be recharged (replace battery).
• The battery charger is not supplying enough power to recharge the battery pack (replace charger).
  

I would start by taking the shell off of the hoverboard and checking the charger port wiring and connectors, and also checking the battery pack wires and connector to make sure they are in good condition and are properly seated where they plug into the control module.