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F7 Long charge, the charger ran longer than 6 hours from the gassing voltage. - Open diode - Low Charging amps - Low AC line voltage - Wrong size battery - Battery over-discharged
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Could be scooter battery voltage is too low for charger to charge battery.
(It is a problem with gel cell batteries I have got a scooter that won't charge at all at home am going to try jump starting with another battery to fool the charger but I might have to buy new batteries.The Nursing homestaff took the scooter off my father in law and left it in the shed to get nice and flat instead of leaving it on float charge I should send them a bill for new batteries
I assume it used to? you may have a faulty charger (if you know some one with another charger you can borrow you can see if that works and if so you need to replace the charger, remember to check the charging amp's on your charger and make sure the one you borrow matches yours, form instance if your changer is 24volts @ 5 amp you need the same charge rate, you can go lower but not higher.as you may damage the circuitry, if the charger is ok then you have probably got a shot circuit on the chair. or the batteries are damaged (if you have a car charger and you can remove the batteries try to charge them with that and see if they take the charge, if not then it is your batteries that need changing)
If the charger is working correctly, it should turn itself off automatically (may go into float chrarge depending on type of charger). There should be an LED or an amp meter on the charger to tell you when the charge is complete. When the batteries are charged, you should be able to leave the charger switched on and it should cause no harm UNLESS the charger is faulty, in which case it will continue charging and damage the batteries. You should be able to tell if this is happening as the batteries will become very warm. If the batteries are losing their charge after you have switched the charger off, it is most likely that your batteries need replacing. Failing that, you may have a short somewhere which unfortunately, could be difficult to find.