On 09/03/2020 14:15, 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.
>
> FWIW, I'd prefer to avoid using a standard off-the-shelf 5v output power
> pack because:
>
> - They're are rather bulkier than a bare LiPO and, if possible, I'd like
> to get a Pi zero plus the battery into the space behind a Pimoroni
> HyperPixel - 4.0, which is 86mm x 56.5mm
>
> - Almost all power packs only have a single mini USB connection for both
> charging and power output, so it would need a additional wiring and at
> least an external socket plus plug to avoid the need to unplug it from
> the Pi to charge it - adding more bulk and fiddling.
>
>
>
Sadly it appears not

https://www.petervis.com/Raspberry_PI/Raspberry_PI_Power_Supply/Raspberry_PI_Mi
nimum_Voltage.html


I would suggest  a 2 cell pack and a model type SBEC.These are very
small and low RFI.
e.g. if in the UK

https://www.rapidrcmodels.com/turnigy-5a-8-40v-sbec-for-lipo-222-p.asp

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