The total voltage or amperage of the battery pack does not mean anything for the battery cells. You can put more cells in series and get a higher voltage at lower current, or more in parallel and get a higher current at a lower voltage. But all individual cells will run at the same voltage in either configuration (iirc between 3 and 4V), and the current per cell will also be the same for a given load regardless of the situation.

The main thing a higher battery pack voltage accomplishes is that the cables connected to the battery don’t need to be as thick, as the required thickness of a cable depends only on current, not voltage.