I had a toy when I was a kid that took 6 AA batteries. Now I know that means it wanted around a 9V input. But why did it take 6AAs instead of one 9V? The 9V would’ve been smaller and lighter, wouldn’t that have let them make a smaller battery compartment and save on manufacturing costs?
In: 7
A 9V battery is just six tiny 1.5V batteries in a package, [like here](https://softsolder.com/2009/01/08/inside-9v-batteries/). It’s just for your convenience, not having to deal with a bunch of essentially AAAA batteries.
But those are very tiny batteries so they each don’t hold much a charge. You’ll get a LOT more battery life from six AA batteries than a 9V.
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