Originally Posted By: Russ
[i] Carry spare batteries and turn the GPS off when you don't need it.


Spare batteries IN EXCESS.

I've experienced several 4-packs of good name-brand AA batteries having a dud in the package. If your GPS needs 4 batteries (my older ones do) and one of the 4 spares is a dud then I'd effectively NOT have spare batteries.

Gotta be careful out there!