So, i've had battery life problems for quite a long time now, and thought it was just something normal that happens overtime, but apparently battery life is supposed to be well above 80% even at that point so... I plan to get it replaced in an Apple Store sometime next week, but i would like to understand what i did do wrong first, so i dont have to change my battery anytime soon again... A few clues : i did used it a lot to play videogames that would make it overheat, but it was like for a 4-5 months period of time over the course of the last 26 months, when i didn't have my PC with me. I spent 5 month in Argentina, where i needed an adapter for my battery charger (French MBA, i believe the electricity norms are the same as in the US in Argentina). It did kill my battery charger after like a month, and i had to buy a new one there. I now use a 80w charger for my MBA (you wouldn't believe how hard it was to even find that one, and how expensive it is related to purchasing power of argentinians, but i digress), it was sold to me as an official one, but i can't really be sure i guess... So can i keep this charger, or should i also buy a new one as it may be the cause that is killing my battery?