You can connect batteries with different voltages in series (a 6 volt and a 12 volt would give you 18 volts), but never in parallel (difference of potential will create an arc, batteries could blow up).
Parallel or Series Connections for BatteriesTo increase current [measured in Amperes], you connect batteries in parallel. To increase voltage, you connect batteries in series.
Connect them in series.
Connect two 6 volt batteries in series. Connect the other two 6 volt batteries in series. Now connect those 2 pairs you have together in parallel. You will end up with 12 volts.
Yes, connect them in series.
You would connect two 12-v batteries in series to get 24 Volts, but if you have four, you can connect two sets of batteries in parallel and then connect the two sets of parallel batteries in series, giving you 24 volts with twice the ampere-hour capacity (four batteries rather than two).
Yes, series and parallel connection of batteries is possible. When connected in series Voltage increases. In parallel, Current increases but voltage is constant.
connect all the positive posts in series and all negative posts in a series
Connect two 12 volt batteries in series and you will have an output of 24 volts.
you only need two 12 volt batteries to make 24 volt. connect them in series
To increase voltage output when using more then one battery connect the batteries in series.
You will get double the voltage.
Connect two 12 volt batteries in series and you will have 24 volts.