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I'm quite interested in how you integrate power management into the PI.

There's very little in the way of 'real' power management solutions for the PI and a myriad of 'power down when the battery is low' solutions ... is a decent, cheap, reliable fuel gauge hat just too much to ask for? :D

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We're using the MCU to swtich power source between USB charging or battery, using it's ADC to serve as a voltage divider to get actual AD value from the battery, and a MP2636GR chip for charging and voltage step-up.

So yay battery percentage! ;-)

How do you do the switching? Using a MOSFET or something else?

Noob here, does this mean that Pi doesn't throttle down CPUs and other chippery? (I'd think that this is solved a long time ago between Linux and ARM, though.)

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