Using water pressure as a metaphor for Voltage (2/3)
If a town were to have more water towers, each at the same height, each kg of water would still have the same amount of potential energy, and thus would arrive at the tap with the same speed. It wouldn't affect the flow rate at all. But, more water would be available before having to pump.
The equivalent in the world of batteries are the various cell sizes of alkaline batteries. AAA, AA, C, D (or for that matter A, B, and F, still available as pieces of other, larger batteries) differ only in the amounts of chemical they have, not in what chemicals there are. Thus, they all have the same electron pressure, or voltage, which is 1.5 volts. The D-Cells just take longer to run out than the AAA.
Using water pressure as a metaphor for Voltage (2/3)
If a town were to have more water towers, each at the same height, each kg of water would still have the same amount of potential energy, and thus would arrive at the tap with the same speed. It wouldn't affect the flow rate at all. But, more water would be available before having to pump.
The equivalent in the world of batteries are the various cell sizes of alkaline batteries. AAA, AA, C, D (or for that matter A, B, and F, still available as pieces of other, larger batteries) differ only in the amounts of chemical they have, not in what chemicals there are. Thus, they all have the same electron pressure, or voltage, which is 1.5 volts. The D-Cells just take longer to run out than the AAA.