I've noticed that since installing openssh that my battery life has decreased a bit. Though I don't know if it was active if I put the device in offline mode. I use to be able to leave the tablet unplugged online overnight and it was fine. But since after installing openssh I can't leave it even offline overnight without the battery depleting.

I'll have to test with issuing an ssh stop command before bedtime to see if openssh is my issue.

But basically, it can be an application issue too.