eli5 dry battery cell has 1.5 volts. what’s the rationale of different sizes of cells having same 1.5 volts? are they meant for space accomodations or more power?

Question

eli5 dry battery cell has 1.5 volts. what’s the rationale of different sizes of cells having same 1.5 volts? are they meant for space accomodations or more power?

In: 8

Answer 1

Voltage is how hard a battery pushes. You want fairly standard and specific voltages because most electronics and machines take a specific voltage. You might change the cell size to fit more reactants(like having a bigger gas tank), to allow the cell to fit in a different shape (cube cell vs a coin cell) or because you want to fit a different chemistry inside the cell (some chemistries last longer, are more resistant to colder temperatures, are more rechargeable or are lighter)