The battery will attempt to charge the charger since the battery is at a higher voltage than the charger. Thus, the battery will simply discharge and generate heat. If you leave it plugged in long enough, eventually the battery will discharge to a point where it can maintain only 6V, where it will stay until you actually charge the battery.
AnswerAccording to WikiPedia (http:/en.wikipedia.org/wiki/Rechargeable_battery), the nominal cell voltage of a Lead Acid wet-cell battery is 2.1 volts, this implies there are 6 cells in a 12 volt Lead Acid wet-cell battery.
1.5v
An Eveready 748 is a combination battery--it has both a 90-volt B battery section and a 1.5-volt A battery section.
I am no expert but until someone answers for sure Im going to help you out and say that yes a 24volt charger will charge a battery slightly. You will in no way get up to 36 volts or the right amounts of amps (volts are like how fast water can come out of a pipe, and amps are like how much water is actually coming out, wide pipe=lots of water; small pipe=less water. but moving both at same speed.) So yes Im pretty sure your 36v batt will capture some electricity and bring it back to mid-low volts (5-15) but you should really find a 36v charger for you 36v battery. if you find this charger keep in mind that the lower the amp rating of the charger (say 1amp -3amp) will take longer to charge the battery but its better for the battery. Higher amps are for fast charges in an emergency and will lower battery performance and life over time.
no it can't
Yes
The same way you charge any battery, by hooking it up to an appropriate charger.
Not by connecting them directly, that'd be too powerful.
Separate the 2 12 volt batteries and charge them individually.
No, you need a 24 volt charger.
I can if I charge 2 of them at a time. Most 24 volt chargers also have a 12 volt setting. What is hard to find is a 32 volt charger. We can charge a 12V battery with 24V charger, by connecting two 12V batteries in series i. e. the negative terminal of the first battery is connected to the positive terminal of the second, now the charger positive terminal is connected to the first battery positive terminal and the negative terminal of the charger is connected to the negative terminal of the second battery.
No
No, you cannot charge an 8 volt battery with a 6 volt charger. The voltage of the charger must match the voltage of the battery.
You would need a 24 volt charger. Connect them in parallel and you can charge them both with a 12 volt charger. Or disconnect them and charge each one separately.
Charge it with a 12 volt battery charger.
Most 24 volt systems use 2 or 4 12 volt batteries. Be careful not to let the cables get mixed up. They need to be put back in the same spot. Disconnect the battery, Charge each battery individually, Reconnect the cables exactly like they were before. You are ready for work.