ELI5. Why do most devices requiring AA or AAA batteries need at least two. Why not create a standard battery that is the equivalent of two or have common circuitry that only relies on one battery of a similar low profile?

Question

ELI5. Why do most devices requiring AA or AAA batteries need at least two. Why not create a standard battery that is the equivalent of two or have common circuitry that only relies on one battery of a similar low profile?

In: Engineering

Answer 1

There are, for example vapes and flashlights using 18650 and other cylinder cells at 3.7

But much like the micro USB, the cheapo electronics import industry hasn’t caught up and it’s much cheaper to buy a AA housing vs a cylinder one

Plus your average dad’s never heard of em