Thought I would update after this weekend's trip - we headed into Olney State Forest for a one night camp.
The Ryobi 1+ worked very well. With a fully charged 5Ah battery we first cut a a dozen or so logs (at most ~125mm diameter) to 110 roof length for transport back to camp then cut them up to fire length; see the pic below
Attachment 125347
After that the battery was still showing 3 of 4 lights. Also it was very quiet, from 20m away it was no noisier than being near to a hair dryer.
As a tool to get wood for the campfire I am very happy with it.

