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by OnACoffeeBreak 3383 days ago
The microcontrollers on these devices don't have MMUs. There is typically not even a USB interface. The microcontroller is in deep sleep mode saving power 99.9% of the time. During that time only essential peripherals are powered on and no code is executing.

A RasPi has no chance of running for 20 years off a single A-size non-rechargeable non-serviceable battery.