I have a 2012 13" MBA w/ i5 & 4GB RAM. Like many of you, I was very disappointed by the battery life. With brightness on minimum and Bluetooth off, I'm only getting a mediocre 3.5 hours of internet browsing (no Flash). Also, my full charge capacity has been quickly falling; it started at 6700 mAh, and after a month and a half of usage has gone down to 6300 mAh. From this, a few questions came to mind: 1: Is my battery defective, and will Apple replace it if I bring it in to a store? If so, can I bring it in to an Apple Store aside from the one from which it was bought (I bought it in the US, but live in the UK)? 2: How easy is it to replace the battery yourself? Also, what is a trusted retailer for these kinds of things? 3: What are some tricks to minimise battery deterioration? (Please do not state the obvious such as turning down brightness, turning off WiFi when not in use, etc...) Thanks in advance.