[throwaway38375]

Yes!

Take a Raspberry Pi Zero and connect it to these:

https://www.amazon.co.uk/Battery-Holder-150mm-Wires-Leads/dp...

https://www.amazon.co.uk/voltage-converter-Raspberry-batteri...

Allows you to run a Raspberry Pi Zero from 8 AA batteries!

I can't remember where I'm getting this figure from, but I think it accommodates for about 3 days of runtime (obviously dependant on what you're doing with your Pi!).