Sewer Glitch

[Afina DellaCyra]

I have reached the sewer part where you float boxes and so on, I've pulled all the switches and turned all the wheels and it auto saved. the pipe exploded I got the battery took it to the generator then the game crashed. I reloaded and as before the pipe exploded, I got the battery but I could no longer get to the surface with it like before the game crashed, which means I drown. Help!