According to wikipedia, the button cell's voltage is 1.5V to 3V and the AA battery's voltage is 1.5V. Why is it that button cells can have as much voltage as something much bigger?
2007-09-19 09:11:51 · 2 answers · asked by Elf Asura 2 in Science & Mathematics ➔ Physics
It is only larger in one sense - that of voltage. The other measure of a battery's output is its capacity in amp-hours (Ah) or milliamp-hours (mAh).
Two batteries with the same voltage may have different capacities, and hence different total energy. A physically larger battery will generally have larger capacity and greater total energy than a smaller one.
A typical 3V button cell has a capacity of 165 mAh. A typical 1.5V AA battery has a capacity of 2000 mAh. Lower voltage, lots more total energy.
2007-09-19 09:42:48 · answer #1 · answered by skeptik 7 · 0⤊ 0⤋
different chemicals, less duration
2007-09-19 16:20:44 · answer #2 · answered by oms 2 · 0⤊ 0⤋