Searching and MRoogle brought me to threads years ago and I'm not sure if anything might have changed since then. I have an '09 13" MBP and since I got the iPad I haven't been using my MBP away from my desk much. I run the battery all the way down once a week to keep it calibrated. When I bought my MBP last year, I thought I would be doing a lot of mobile stuff but now I think I'd be better off with an iMac. Since funds won't allow, it looks like I'll be using the MBP for a while. Anyways, would it hurt my MBP to keep it on all the time (without sleep)? I'll keep the ritual of running the battery down regularly. I'm just afraid of something hurting, overheating, etc. Thanks!