In article , Martin Gregorie wrote:
> Has anybody tried running a Pi Zero from a single LiPO cell such
> as you'd use in a RC model aircraft or a drone? The voltage varies
> with charge from 4.2 v down to about 3.7 v
>
> I think it should work since the Pi has a regulator that drops the
> 5v supply voltage to 3.3 for internal use, but I don't know what
> minimum voltage the internal regulator needs to work correctly.

Good question ... I haven't tried, but I have a project in mind for
which that would be a good solution.

But ... are you aware of the various buck/boost converters available?

Adafruit do quite a nice one, which is tiny and only around a tenner,
and there's the Pi-specific "wide input shim" from Pimoroni that does a
similar job.

Adafruit also have some similar little boards that manage charging the
battery as well as regulating the output power, under the "powerboost"
label. I have one of these, but beyond satisfying myself that it works
I haven't done much with it. In particular, I'm not sure how well it
behaves when  the battery becomes exhausted ...

All available from the usual suspects ...

--
Cheers,
 Daniel.

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