Four 12V batteries may not be connected end to end to obtain 36 Volts. But four 12V batteries can be connected end to end to provide 48V and push 36 amps. The actual answer to your question suggests that you drop one 12V battery and use three, not four 12V batteries end to end to obtain 36V.
Paralleling four sets of 6 volt batteries will still give you 6 volts. Two 6 volt batteries in series will give you 12 volts. Parallel these series sets will give you longer endurance at 12 volts. There is no way you will ever get 48 volts out of four 6 volt batteries.
You must hook them up in series. You will need four 12 volt batteries to do this.
You can not. Looks like you have the two and eight backwards in the question as you can reconfigure eight 2 volt batteries to produce 12 volts. Think out of the box. Parallel two sets of two batteries in series for a total of four volts. Then add four batteries in series for an additional eight volts. You now have a total of twelve volts.
9 volts
the answer is 36 volts
Connect 2 of the 6 volt batteries in parallel and then connect the other 2 in parallel. Now connect those 2 pair in series to each other. You will now have a total of 12 volts with four 6 volt batteries connected in parallel/series. Click the link.
A group of ten (10) batteries composed of 6 Volt and 12 Volt types will have six (6) each, 6 Volt and four (4) each 12 Volt batteries. The contributing voltages will be 6x6 and 12x4 for a total of 84 Volts.
Two 24 volt batteries in parallel will give you 24 volts. The only other way is two 12 volt batteries in series.
36 volts
To maintain the 12 volts using four batteries they have to be wired in parallel connections. This means that all of the positive posts are connected together and all of the negative posts are connected together. The total sum of all of the batteries will equal 12 volts.
No, 12 volt batteries are 12 volts.
Four D batteries in series produce nominally 6 volts (1.5 volts per cell). A 12-volt supply may damage the machine built to run on 6 volts.