I thought about the battery being exposed too, but while thinking about it, because of that hole in the back of the accurite, the battery is already slightly exposed anyway. And I haven't seen any corrosion or anything in batteries in them before I started zip tying them, but we'll see how this goes. I just started it about a week or so ago, and have a ton of the little zip ties, so I was planning on just replacing the ties everytime I scrubbed out the tubs. This way I'll just keep an eye on the batteries and on the functioning of the accurites themselves (I always keep extras around anyway) and see how that goes. If it becomes a problem, maybe I'll get some of that press and seal stuff and try covering the battery area with that. I wonder if that stuff would stick to the accurites?