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
A battery is 1.5Volts.
If you connect two batteries one on top of the other (connecting them in series) you create a 3V battery circuit.
If you connect their tips together and their bottoms together (connecting them in parallel) you create a 1.5V battery circuit that will last twice as long.
Creating new standards is hard cause it messes up compatibility. The current system for AA and AAA batteries gives designers a lot of flexibility to choose how to power their circuits and a lot of devices that have different power needs use internal batteries that can be recharged.
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