5 volts
You cannot charge 108.5 volts with a 12 volt charger. What are you charging that has that kind of voltage?
About 5 watts for an iPod and 10 watts for an ipad
No one cares
You need to mention the voltage to calculate the wattage
In terms of size and comparability yes. However, I think there is a very minor charging difference in terms if power output. [Added by DH - I think you'll find the only difference is that the mains adapter for iPad has 2A output vs. 1A for iPhone/Pod. You should be able to use the iPad charger with iPhone (will only draw the required current). And you should be able to use an iPhone charger with iPad (but it will take longer to charge).] The charger port are not same in size. But some universal iPhone charger (not original made by Apple) can support both of them.
6 volts
Just a little over 3,000 volts
If you are using a different charger that is not approved by Apple, the charger will be very slow for an iPad 2. If using a Apple charger, your charger terminal could be failing. You can go to any Apple store and have it fixed if it still under contract.
41
12 volts DC.
No, if they are wired in series you have 36 volts assuming each battery is a 12 volt battery. They will have to be wired in parallel to output 12 volts. In that case you can charge them with a 12 volt charger but it will take 3 times as long as charging just one 12 volt battery.
24 Volts.