Yes there is a way.
Make 2 sets of 3 batteries in series (+ of one battery gets connected to - of other)
Now connect the to sets in parallel. Connecting the 3 in series will add the voltage to 36, connecting the two sets will keep the voltage the same but increase the capacity.
Check here for more info
http://www.engineersedge.com/battery/battery_series_parallel_connections.htm
No, the battery will be overcharged and battery damage will occur if it is done.
Volt/Voltage
volt or voltage.
The voltage is unknown, because it depends on the impedance of each battery. Certainly, damage is going to be done, because there will be excessive current.
This is not advised! The 9-volt charger might have a current limiter so that nothing burns up, but it any case if left on it will destroy the 6 volt battery by overcharging. A 6-volt charger is not expensive.
No a volt is a measure of the "push" or potential. A watt (a volt times an amp) would be a measure of the work.
Yes, it can, but unless the battery has the same terminal layout, and the same physical attachment, it can't be done without lots of modifications.
Unhook battery unplug the regulator and remove from firewall place new one on firewall plug it in reconnect battery and your done.
Yes the battery change can be done by the consumer using the WORX 18-volt replacement battery
Yes. It is done all the time in automotive electrical systems. The alternator, which creates AC, has its current rectified using diodes.
connect another 12 volt source to battery leads before changing. if done correctly this will save your on board data.
V = W/Q where V = voltage / Volts W = Work Done / J Q = Charge Passed / C therefore your answer is W = VQ = 12*80 = 960 J