Personal experience: I'm on an early 2011 MacBook Pro (purchased in March, 2011), which I've used for about 8-10 hours per day, 5 days per week, since the date

Personal experience: I'm on an early 2011 MacBook Pro (purchased in March, 2011), which I've used for about 8-10 hours per day, 5 days per week, since the date I purchased it. I have about 6.5 hours remaining at a 91% charge (screenshot for proof http://cl.ly/image/1a2d2y2V1J2O http://cl.ly/image/1a2d2y2V1J2O). I consider this to be pretty good for a notebook that has been used extensively for more than 4 years, which is why I felt like I should share my advice on keeping your battery healthy (I do exactly this, and have since day one, except when I'm mobile and actually use the battery - about 2 times per month - today is one of those days): 1. keep your notebook plugged in all day while you work 2. unplug your notebook when you power it off at night 3. on Friday, unplug partway through the day, allowing the battery to drain to about 30% by EOD 4. Monday morning, start back at step # 1 The bottom line is, run the charge down significantly 1 (or 2 max) times per week, and let it sit (over the weekend) without a full charge.