As I mentioned, I've purchased 3 or 4 flashlights from this company and I've only had to replace them due to theft. The battery pack is shrink wrapped in rubber membrane and then is inserted into a nylon holster so I'm pretty sure it will be fine, plus I put it in the handlebar bag. I really like the fact that the mount is both quick and easy to install and remove as well as adjustable on the fly. Here are some pics:
https://picasaweb.google.com/1010329...023128/Segway#