When depressed, I've slept up to 14 or 16 hours some nights. However, I've stayed in bed (with just trips to the bathroom or fridge) 24 hours for weeks.

When manic, I usually still get at least 2 hours of sleep, though not usually quality hours. I'm not sure if I ever got zero sleep for multiple days in a row, but I've had weeks where I only got 2 to 4 hours max per night.