I charged the batteries for 12 hours and then turned the chair on. The batteries appear to be bully charged, but the chair will not move. The joystick is flashing 8 times. Apparently a joystick fault? Any self-service suggestions?

I had same problem. I found a Zip Tie had dug in the wires that only effected the charging not the controlling part. Till the Zip Tie dug in farther, till it cut another wire, preventing the chair to move. That's is when I discovered it. After finding this out, my old batteries were probably good. I just assumed it was their end of life

Evonne the batteries were probably overcharged you should never leave it charging for more that 12 hours Check that the freewheel levers are in the drive postion they are two levers under the front of the seat. They should be pointing toward the center of the chair. If they are in the drive mode then there are other problems. Contact Roadrunner Mobility @ 1-800-467-2668 to see if they have a tech that can come out to check the chair Medicare will pay for most of the repair cost if they paid for the chair. Hope this helps

PK 36 hours charging is too long you will damage the chair and the batteries. You shouldn't have to charge more than 12 hours and never more than 24. If the batteries are weak the chair might power up but you don't have the power to energize the motors. If you have a digital voltmeter set it to 200 volts dc and plug the leads into the two outter holes of the charger port located on the joystick. You should be reading 25-27 volts with the batteries fully charged. Anything less than 20 volts will not be enough to power the chair. Hope this helps you

Leo Man you need new batteries. No amount of charging will recover those batteries. The reason you have power when charging is because of the charger suppling the power to the chair and when you unplug it you have no stored voltage in the batteries to power the chair. If Medicare paid for the wife's chair contact your provider or a service company to install new batteries in her chair. Medicare will pay for most of the repair cost. Hope this helps you Good Luck

Romp, Did you check the freewheel levers chair will not move if you are in freewheel. Levers are in front next to seat posts and need to be facing forward. If you are not in freewheel then check the number of lights you have on on the joystick and that they aren't flashing. Also check that your speed control is not on the lowest setting even with some charge a slow speed setting will not let the chair move. Now by some charge you mean lights in the green on the joystick? If the lights aren't flashing then I'm kinda unsure other than even with some charge the batteries don't have enuf current to drive the motors and need to be replaced Hoe this helps

You will need to connect the charger that was issued with the power chair to a working electrical outlet (do not use an extension cord or power bar/strip), turn it on and connect the other end to the power chairs' charging receptacle. Keep it connected for 8-12 hours or until the light on the charger indicates the batteries are charged.
If the charger indicates the batteries are charged but the charge does not last more than 1-2 hours, they batteries may have gone bad, are worn out and need to be replaced.
Good luck!

Yes prob one of the batteries are bad, but you may want to replace both.

you need to have the batteries tested it is possible that if left in a discharged state for an extended time that thee batteries may be damaged and will not be able to be recharged

It's designed NOT to move while on charge (so you don't drive off with the charger following you around!). It will, however light up, and indicate that it is on charge and can't be moved. After unplugging the charger, if it will not light up, then you most likely have dead batteries that won't take a charge and need to be replaced with the proper gel-sealed deep cycle batteries for you chair. Bost chairs take U-1, Group 22, or Group 24 batteries. You will need to remove the old batteries and take them in when you get the new ones to avoid a core charge, and protect the environment. They will give you a like-size battery to reinstall. Completely recharge the new ones for a couple of hours, and you are ready to go.

The lights are working, the batteries aren't. Red indicates power to the charger, and it should be on all the time. Green indicates a full charge, usually. If one or both of the batteries are totally dead, then the charger can't "see" them, and you will get a green light, but you will have dead batteries.

All power chairs use sealed, deep-cycle batteries. Deep cycle batteries, are designed for slow amperage dischare over a long time period, unlike a car battery that throws out a lot of amperage for turning the motor over. That's called "cold-cranking amps", and you can load-test a car battery to see if it will throw out a ton of amps for long enough to start a car. There is NO load tester made, or possible for a deep-cycle battery. A load test requires a 24-hour time period, and a complicated formula.

So, your course is to get some fresh, gel-sealed-batteries. You will need type U-1. Specify, gel-sealed-batteries when you go to the battery shop. A fresh set should get the chair up to about 12-16 mile range, which would be about 3-4 hours running constantly at high speed. Good luck.