I read some of the points on this thread and I noticed the bit about calibrating your battery as soon as you get your laptop, and I was wondering if it was too late for me to do so? I would assume not but I am interested in being able to always have an accurate reading of my battery. Is there a way to know if my battery is built-in or removable without opening the laptop? I have a late 2010 13'' model. I also read in that thread that it was recommended to leave my laptop plugged in to a power source for a couple days and then remove it and let the battery run. I usually just charge it to 100% (or so) and let it run low (10-20%) and then charge it up whether it's either on, sleeping, or shut down, and repeat that process. Is that not proper? EDIT: Just reread that bit, and I missed the "IF you leave your laptop plugged in for 2 or 3 days..." Sorry about that, but I would still like to know if my procedure is reasonable or "correct," please. Lastly, if I could get some opinions on its current state. I have had my MacBook pro for about four and a half months now and I have 113 cycles and I usually get an average of about 10 hours on a single charge. Is this reasonable, considering only owning it for that short amount of time? Sorry for the length and amount of questions, but Thank You to all responses.