I have a Jazzy that we replaced the batteries on last year. It sat idle all summer and the batteries were dead. I used a trickle charger because the on board charge did not help. The batteries were fully charged, but the gauge by the reset button is not showing anything when I push it. The batteries are also losing the charge, even with the cord plugged in. Is this just the charger or does it have something to do with the reset button?

Batteries that have been left in an uncharged state will sulfate the plates and render them useless. Only by removal of the sulfate will they be useful again. This is a
very expensive process only accomplished commercially.
Replace battery and keep it fully charged to prevent sulfation. This can be done using a battery maintainer not
to be confused with a trickle charger. Maintainer only charges battery when needed not all the time like a trickle
charger. A trickle charger will also cause a battery to become dry which also damages the cells.

Hey Michele,, if the original battery lasted this long.. you are lucky,, just replace it. >>> Always use the exact replacement battery<<<<... your quad is designed to take the exact size and amperage rating,, trying to change this is inviting too much trouble,, When you get a new battery,, it will be charged unless you purchase one online that comes with the acid pack,, EITHER WAY - put the battery on the trickle charger for 48 - 72 hours BEFORE you use it.. This will extend the life of the battery a bunch and make it a stronger battery,, ..(this is from too many years of experience.)

Check for fuses. In the charger, and/or the Chair. Could also be a circuit breaker device.

Check the charger output to verify whether or not you have a bad charger using a voltmeter. These smaller batteries are notorious for having a short shelf life and poor quality control from the manufacturer. Load test the batteries after you verify you have a working charger that will bring the batteries up to the proper voltage first.

The charger shouldn't have hurt the battery but corrosion is caused by fumes from the battery being charged or used. If you know the cable ends are clear, the battery probably has a dead cell and will need replaced. Most parts stores will do a load test on the battery for free.

Sounds to me that all the right checks have been made...
Heres a tech Tip ,9/10 battery chargers cannot bring up a pair of dead battery's.In our case Larry thats whats happening here.There isnt enough power in the batterys to turn your charger on.
Here are some steps in testing your charger ..
1) Take the two batterys out of the scooter
2) Find your self a battery charger that you can set at a trickle charge ,this setting charges at a very low voltage
3) Trickle charge each battery to a least 50%
4) Install the batterys back into the scooter
5) Plug in your charger
Now in doing this your charger should kick on for a while ,dont worry if it shuts off .The batterys being bad is the reason for it shutting off ,we are just testing to see if your charger is working.

This should keep you out of the shop.good luck

Battery is not good, does not have enough amperage, try connecting car battery with jumper cables or use battery charger with engine start if bike starts, buy new battery

The battery charger is only made to last 1 year if you
re lucky. They are all made in China very cheaply and some only last a matter of months. If you are on Medicare they will replace the charger if necessary after a year. Good luck, hope this helps

Have the batteries load tested. If they have sat to to long then they will need to be replaced.