Add Voltage in Series, and add Ah in Parallel. But you add Amps in series as well BECAUSE its commulative!!! Fact!!!
Once you add up the batteries in series you get a certain sum of voltage and a sum of amps. V x A = Ah
Each battery has a Ah rating, while the output of the series cct has a Ah.
Add each battery Ah, thats the output of series cct.
If the amperage is commulative in a series cct, then you have a 1C 2A 3V battery. 100 in series = 300V 200A 600Ah.
How can the last battery at 1C 2A 3V be able to handle the throughput of 200A?
Voltage is your "Water pressure in a water pipe" voltage between 2 points is "electrical force" that would drive an electric current (measured in Amps) between 2 points.
Amperage is your "Flow rate" how many electrons pass in a time period 1 Coulomb/second.
Resistance is the "Pipe Size"