yes
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.
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.
6 Volt
No. 4-AA batteries hooked together is a much smaller package than the 6 volt lantern battery.
Yes, if the two 6 volt batteries were connected together 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.
Two 6 volt batteries in series, yes. In parallel, no.
No!
Don't know what your intentions are but the 6 - 6 volt batteries would probably deliver more amps. ======================================= -- If the batteries are connected in series, six 6's are exactly equivalent to three 12's. -- If they're operated in parallel, then the terminal voltage of six 6-volt batteries is still just 6 volts. There's no way to connect 12-volt batteries and make them look like 6-volt units in parallel. It's really important to find out exactly how the original 6-volt batteries are connected in the device. 1). They may be all in parallel, giving an output of 6 volts. 2). They may be all in series, giving an output of 36 volts. 3). They may be connected in three parallel branches of two series units each, for an output of 12 volts. 4). They may be connected in two parallel branches of three series units each, for an output of 18 volts. If you know what you're doing, you can replace them with 12-volt units in cases 2). and 3)., but not in cases 1). or 4).
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.
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.
If your load runs on 6 volts, you cannot replace it with a 12 volt battery. You will be exceeding the voltage rating of your load and will start a fire.If you want more amps (capacity) then you can wire more 6 volt batteries in parallel with the first.