Hello, I bought a new 15'' MBP last weekend. This is my first Apple laptop. One thing that got me thinking is the battery for the new MBP. My question how often should I use and charge my battery? With my old laptop, I hardly ever used the battery and as a result 2 years down the line, the battery of the laptop wouldn't last more than 5 minutes. The laptop was always plugged into some power source. However, I do have an iPhone and my philosophy for the iPhone has been simple - use it and charge it only when it is out of power and needs to be charged. Some folks that I see around who have MBP only the battery when they are travelling around, but in offices, schools and home they are connected to power source all the time. So what's the best strategy to follow for MBP for a longer lasting battery in terms of battery usage? Should I: a) Just use battery only when I need it? b) Use it like my iPhone - use battery often and only charge when it is running out of juice to recharge it? Also is there an app or software that would tell me how long I have been using the battery since it was last plugged in? For instance, the battery of my new MBP lasts about 7 hours or so (sometimes more when I am not using a lot of apps and decrease the brightness of my screen). This means, I use battery for couple hours here, then couple hours there... and I loose track for how long I have been running my computer on battery only since last time it was plugged to power source. So is there an App that can calculate the total time it has been on battery since last charge or last connected to power source?