THP:
I own a couple AquaPro feeders and had the "opportunity" to work on a TH feeder last year that was completely submerged and sat for a couple of days with food in it after the water receeded. After a day of drying out the timer, and a new battery it worked just fine. When it comes time to buy another feeder (providing I don't need to feed AquaMax Largemouth pellets) it'll be a TH.