My battery drains completely after about 8 hours of sleep in suspend mode. It seems a lot like this bug, from the Lenovo forums. I've tried changing the sleep mode to "deep," but then it doesn't wake up from suspend at all.
Is there a way around this issue? It's really annoying, and probably not doing wonders for my long-term battery life.
I have a Lenovo Yoga C930, running NixOS.