Disposibles are still an awesome option when you don't want to risk your gear.
I used to process the film and the only advice I'll give is… Crack it open and get the battery out before taking it to the printing shop! (You won't damage the film).
Seriously, they've always put a whole AA battery in there. We used to have a bucket full of them.
Also, anyone thinking of reusing the camera with another roll of film: Forget it, the canisters are put together reversed.