QUESTION: Can you overcharge a mobility scooter battery?

Yes. Difficulties can occur if a battery is either undercharged or overcharged. How long does it take to fully charge a mobility vehicle? Battery charging takes an average of 6 to 8 hours. Achieving a full charge can take up to 12 hours. Most models include chargers with automatic shut off, allowing the user to plug in the charger at night and have fully charged batteries by the morning without the risk of overcharging.