|I think he said, "Do not plug it into your computer until tested."|
You see that little red or green light? It is NOT water tight. It is in position by pressure only. I'll bet water stays in it for months. Has to do with atmospheric pressure (water heavier than air) and moving air to evaporate the water. How do you move air inside the box you can't open? Slowly. Takes a long time for the atmospheric highs and lows to perform that operation. Then you have to worry about corrosion / oxidation!!??!?!?
I'd buy a new one. Why risk a netbook, notebook or ??? for a power supply? Consider it lost. Or take a chance, if you feel really lucky.
IF you feel exceptionally lucky, drill a hole in the top and bottom to let the water out....<LOL>