I have a go chair and when I plug it in to charge the light on the box is both green and red. It does not say charging. But will not power on either. Is the battery bad?
If you are referring to the lights on the charger, the issue could lie either within the charger or the batteries themselves. If the lights are on the joystick remote, that would indicate there could be an issue with the batteries.
You can try using a trickle charger on each individual battery, and then bring the batteries into a store such as Walmart Automotive Center, Batteries Plus, or Autozone and requesting a load test be performed. A Load Test should be a free service, so if they try to charge you, feel free to go elsewhere.
A Load Test result of less than 70% would indicate the battery health is compromised and would be recommended to be replaced. If the Load Test result is higher than 70%, there could be another issue within the unit and it would be recommended to have a technician formally diagnose it.