Yes, if the two 6 volt batteries were connected together in series.
Two 6 volt batteries in series, yes. In parallel, no.
use two 12 volt batteries in series.
To get 24 volts from two 12 volt batteries, hook the positive post from one battery to the negative post of the other.
If you have two 6 volt batteries you can take a jumper wire and connect the negative post on one battery to the positive post on the other battery then connect the remaining pos and neg posts to the 12 volt battery charger.
Add two 1 volt batteries in series with it.
It depends on how the two six volt batteries are connected. If they are in parallel then the answer is no. If they are connected in series then the answer is yes. To find out for sure check the voltage that the starter needs. If it says 12 VDC then you will know that the two six volt batteries are wires in series and can be replaced with a 12 VDC battery.
By connecting two 6 volt auto batteries in series. Or by connecting eight 1.5 volt batteries in series.
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.
connect the 2 six-volt batteries together one terminal each positive to negitive, this will make a 12-volt combination, then you can connect the jumper cables, one side to the 12-volt battery and one side to the two 6-volt terminals, + & -
To connect two 12-volt batteries while maintaining a 12-volt system, connect the positive terminal of the first battery to the positive terminal of the second battery, and then connect the negative terminal of the first battery to the negative terminal of the second battery. This setup keeps the batteries in parallel, preserving the 12-volt output while increasing the overall capacity (amp-hours) of the system. Ensure that both batteries are of the same type and charge level for optimal performance.
You connect the batteries in series Red charger lead to one red battery terminal, then the black battery terminal of that battery to the red battery terminal of the second battery. Then black battery terminal of the second battery to the black lead of the charger.
two, a 12 volt and a high voltage battery