well...my Arc AAA went through a heavy wash cycle and it still worked perfectly afterwards.
While cleaning the innards of the unit with rubbing alcahol, i accidentaly got some on the foam retainer, not knowing that alcahol damages foam (and your kidneys...well the stuff you drink anyway). To this day i have not sent in for a replacement yet so i'm running my Arc AAA without a foam retainer. And it still works...
I've dropped mine on tile and concrete without any problems.
Sometimes I attatch it to a lanyard and swing it about because it looks cool when it's in motion. Sometimes, though, it slips from my finger as i twirl it around, and most of the time it hits a wall...HARD. But it still works.
It did die recently however after i left it overnight in my car's change compartment. But it turns out my problem is shared amongst a few other Arc AAA owners, and a SIMPLE fix was all i needed to get it up and running again. I don't think it died because of the heat inside my car. I heard a story once of someone losing their Arc AAA in their truck for a month or so. He said that the temperature changes were extreme, especially in the car. He said he found it and it turned on without a hitch. He also opened light to see if their was any leakage from the battery, and it turns out there was none.
The Arc AAA is a tough little thing and it is probably the best 20 bucks i've spent. Peter Gransee has truly made a great product AND company!