My father-in-laws gogo will be not used for several months while he's in florida. how should the battery be stored/charged while not in use?

Do you mean a charger plugged in for four months ? or the battery pack on the scooter for four months ? if it not charging and left on the scooter they will discharge and may never recover.

Leaving it on charge for four months ?, the charger will go into trickle charge mode once it fully charged the batteries, manufacturers will agree this is a good thing , if left for weeks and weeks , it should be charged up fully once a week if not in use and i recommend removing the battery case as i seen issues arise from leaving a battery pack on a scooter for long periods of time, for starters they discharge quicker,.

I have one of these, as well as having had several different "Go-Go" models - none of them has had the back up reverse beep feature. You can, however, do it manually with intermittent beeps on the horn while backing up if you aren't needing both hands while backing up (not advised though) ;o)

Sounds your batteries are to low in voltage for the charger to recognize. Also check the fuse on the battery box, normally a red one 10amps.

Have you tried to get manuals for this tractor by googleing?

got the same problem the gel cells drain to a level that is too low for the charger. A suggested fix I have seen is to jumper a car battery across the gel cell to fool the charger so it will go into charge mode.
I have not tried this my self yet as I have to remove the chair to get to the batteries on my father in laws ride on chair. The nursing home took the chair off him and left it in a shed without it being on float charge for over 6 months and now I can't charge the chair up.

Firstly, it is bad news to use an extension cord with the charger as it can get very hot. It will sometimes take 8-12 hours to get a full charge on the batteries. If the light does not go to green on the charger, the batteries may be damaged and not able to take a charge. This is especially true if the Power chair was stored after your father in law died; the gel in the batteries may have gone solid. The lights on the controller will go left to right then back if the charger is connected properly.
The brake release knobs both need to be in the UP/DRIVE position for the motors to engage.

battery cells damaged
replace
it
its in warranty even if its not og
other third party battery makers give 6 month warranty

When was the last time you went into the your settings and update your software or configured the unit? On cloudy days you can't do this. On a bright sunny day go outside and try this.

hi,

Check the connections between the battery and motor, if the rear come apart check there connections there,

If the connection with the batteries string loaded, rough them up slighty with a wire brush but be gentle and is there freewheel lever right in position for drive.

Regards
GeWiz.

Most vehicles if you get the car running and unhook the positive battery cable it will stay running that is because it is running off the alternator. if it dies like your talking about I would most definitely say your alternator needs to be replaced. Most likely when you jumped your father in laws pick up there was a bad ground somewhere and your alternator got a surge of electricity and it fried it. Hope this helps.