the collective voltage of this cart is 48 volts . fully charged it will be anything up to 51 or 52 volts . If the voltage of your batteries is less than say 41 volts because they are very very low then your charger will not kick on. You will have to charge the batteries one at a time using a car battery charger. The Golf cart charger you have will only turn on and charge when the batteries are above a certain voltage . You are obviously below that. Or you batteries are simply no good at all because they were dry for to long . Go to your local batteries plus store and have them check them for free.
With a battery charger or alternator.
No, you will ruin your batteries and charger.
It can be used with a solar battery charger.
As long as both batteries are the same voltage, you can jump start with the battery. If you want to charge the battery then use a battery charger.
No. A battery charger has to be specifically matched to the batteries to be charged.
Do you mean that you can not charge it with a battery charger or the mower will not charge it while it is running? If you can not charge it with a battery charger and you are sure that the charger works then the battery is bad. These type batteries are only good for a couple years. If the mower is not charging the battery it could be a number of things.
It is always better to use a charger designed to charge a particular battery type. Using a NiCad charger for NiMh batteries or vice versa can cause damage to the charger or batteries, especially if the charger is designed to charge the batteries in under two hours. The worst case is a fire risk. Some charger and battery combinations will work perfectly well together but it is safe to assume that the charger will only be suitable for the battery types stated on it.
No.
Unless it is a rechargeable battery you cannot charge a dry charge battery. If it is rechargeable you need to purchase a charger for that size battery. Automobile batteries are not dry charge.
Charge them with a 6 volt battery charger.
No, only rechargeable batteries can be recharged.
where did you get a battery charger that charges 1.5v cells. non rechargeable batteries are 1.5 volts. rechargeable batteries are 1.2 volts. i would throw that thing away and get a new charger.