After you purchase a mobility scooter, you must charge the battery for up to 12 hours. As you continue to use the scooter, you must keep the battery charged to extend the life of the battery. The only way to charge a mobility scooter is with a charger, so if the battery isn't holding a charge, you will have to apply general troubleshooting techniques to find a solution to the charging problem.
Charge the battery as you normally would. Plug the three-pin male plug lead into the three-pin female socket on the battery charging pack. Plug the A/C power cord into the wall socket. Do not interrupt the charge cycle, as this may damage the battery.
Check any disruption in power on the battery charger. Examine the two lights on the charger. The green indicator light shows the battery charging; the solid red light shows power to the charger. A dim or flashing red light indicates an interruption in power. Press the "Reset" button, located at either the rear of the frame or under the seat of your mobility scooter.
Test the voltage reading of the battery with a multimeter. Connect the multimeter to the battery and drive the scooter a short distance. The battery reading shouldn't fall below 11 volts. A low voltage reading may indicate a faulty battery that you need to replace.
Check the fuses in the battery pack and replace any that are blown. Open the main control box and unscrew the cap. Remove any blown fuses and replace them with a 2.5 amp fuse.