Sorry if I landed up hijacking the thread and sending it off on a different tangent, but being prepared for the trip is also about not giving authorities (added / unnecessary) reasons to fine, if stopped, which I'm expecting to happen at this time of the year (road blocks).
Cheers
@SauRoNZA
I subsequently read up on Waze and Google Maps, and apparently Maps uses quite a bit more at up to 5 MB / hour ; still next to nothing ....
.... and for both, if you apparently do your route planning while on WiFi (including zooming in and out along the route, one post stated) then they use around half the usual amounts, on mobile.
Then looked at battery saving options - although my phone has a 6,000 (not a typo) mAh battery, after slightly over a year's use I think if the screen's on for 8 to 9 hours, it might not make it for a full trip.
But realistically, I think I'd only use either app for 1/2 that time at most, with screen on.
Glad to see they have voice directions available even if the screen's off, as well as traffic alerts efc.
Screen use mainly for when getting close to CPT, and exactly where I need to get to.
(plus will download offline maps as a backup & have an old Garmin, leading the way, at times).