No Yes. hook two in series, two in parallel.
you only need two 12 volt batteries to make 24 volt. connect them in series
You cannot use a 12 volt charger to charge 2.6 volt batteries. The 2.6 volt batteries will become hot, very quickly, and explode.
No!
use two 12 volt batteries in series.
Connect three 12 volt batteries in series and you will have 36 volts but will only have the amperage of one of the batteries.
Depends on the battery size. If your boat is a 12 volt system and you wire two 12 volt batteries in series you then have 24 volts. If the batteries are 6 volt batteries you will be fine. If you have a 12 volt system on your boat and want to use two batteries then wire two 12 volt batteries in parallel. You will still have 12 volts but will have double the amperage available and this will extend the running time of the batteries.
If your cart has 4, 12 volt batteries in series to make up the 48 volts, just connect the 12 volt lights across one of the batteries.
how Can you charge multiple 12 volt batteries with a car?
Yes, If they hooked-up in series, not parallel.
Depends on the amperage of the batteries you are using. Both setups will give you 36 volts, but you will normally have a longer run time with six 6 volt batteries in series than three 12 volt batteries. That is why golf carts use 6 volt instead of 12 volt batteries.
To get 24 volts from two 12 volt batteries, hook the positive post from one battery to the negative post of the other.
join two 6 vault battaries two make 12 vaults