eTrex x0 water resistance in GPS technology and devices Posted April 26, 2012 Now that I think of it, I do have time to do at least this simple test today: Turned the GPS turned on (demo mode), dropped it in a cup of water on my desk, will check in a few hours. Battery compartment tight, but I purposely left the rubber thingie over the USB port unseated. Will check back before I leave the office today. This isn't be as severe a test as submerging for half an hour in a meter of water -- but it'll be more of a soaking than most folks would give it on a rainy day or a drop it in a puddle. Pictures to be attached shortly.