This morning, I picked up my phone, and noticed that it was off, just as I reflexively squeezed the button to turn it on. It came right on, and immediately emitted a beep that meant the battery was low. So I turned it off, plugged it into the charger, and by this evening was all charged up again.
The phone works as if it had never gone in the river. Someone up there likes me. And he understands cell phones! (It's a miracle!)