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
Most devices need something like 1.8-3.3V to power microcontrollers and LEDs. One AA/AAA battery does 1.5V, inherent from their chemistry. There are devices that work fine off 1.5V, either by having a small internal voltage doubler circuit or just by having ultra low voltage components.
There *is* a 3V AA-like format using lithium like coin cells do. It’s called CR14505 and it’s like 5$ a pop. It has similar energy capacity to the much cheaper 1.5V batteries.
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