Get one of these just to hold the battery in.
https://www.amazon.com/dp/B0834X4HCP/ref=cm\_sw\_r\_apa\_i\_F3S18P25TFTCWCXAK4MN\_0
Then get one of these if you go in the water.
https://www.amazon.com/dp/B0749DBX11/ref=cm\_sw\_r\_apa\_i\_6VEY6422BQ03JN2JRGCW\_0?psc=1
You can get replacement doors for it, but they come from China. So you most likely won't get it in time. You can always get one when you get back from your trip.