Hey, i recently purchased an alienware m17r2 i just wanna know how to keep the battery healthy for a long time. Is it okay to leave the ac power plugged in even if the battery is fully charged? Will it harm the battery? Or i should unplug it and then use it? Is there any way to use the ac power only when plugged in? Will it effect the performance of the pc? In my old laptop i used to pop out the battery when not needed but i cnt do that anymore here. I recently tested the battery and the results showed that my total battery capacity was 76wh but now it is decreased to 72wh in just a month of mild usage so is there any way to use ac power completely and leave the battery untouched? Or will it harm the performance doing so?