Thanks for the replyImperf3kt wrote: AA batteries won't last very long, even with a Pi 0.
Make sure you have a way to safely power down the Pi if the battery voltage drops too low (to avoid SD Card corruption)
I'd personally use at least 4 AA batteries and a DC-DC buck converter to drop the voltage, instead of boost it, to 5v
Thanks - guess using aa to power is just not an optionMarkR wrote: ↑Wed Oct 11, 2017 3:32 pmStepping the voltage down would mean you need less current. Stepping up always needs more current.
But 4x AA is nominally only 6v, but it doesn't take much drop to go below 5v, which can't use a buck converter, and there is also a dropout voltage. So you'd need a boost-buck circuit.
Alternatively, maybe better, use some lithium cells but you need to be more careful and have a special charger. It's possible to just use a normal "power bank" pack, maybe disassemble it but keep the charging circuit etc.
This is the first thing you need to consider - a way to measure the battery state and take action before it drops to a level that would disrupt the Pi.
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