Sorry if this been answered but I can't seem to find a thread to answer my question. I'm pretty much in the market to buy either a macbook pro or imac. I understand that portability is a big factor (I don't really care since I my wife's pro which I could use) when choosing one over the other. I'm more interested in the iMac since i'm worried about the battery dying on me and i'd have to buy another one. I do use the computer and keep it on for more than 8 to 10+ hours everyday. My question is if i were to connect the macbook pro to an external monitor and keep it plugged to the power, will that deplete my battery's charge?