I'm reading a lot of battery issues and recommendations on how to improve my battery performance. I know that calibrating my battery by draining it doesn't improve my battery performance. One interesting opinion was to drain the battery all the way down and charge all the way back up to calibrate my battery with the gauge. I wonder if this is necessary, or better yet, whether it makes a huge difference. And also whether it's safe. I've never calibrated before. It just seems a bit contradicting to me, how it says you should not run the battery all the way down, but it recommends running it down at least once every month or two. It's not healthy for the iPhone battery to be completely drained but do it at least a couple of times? To me that's very confusing. I do see some issues with my battery usage. It fluctuates a bit I think. It will say, 55% and jump up to 58%. Or It was around 45%, then drops down to 38% in a matter of a few minutes. I do notice when it's almost full or is above 80%, I don't have the fluctuation issue. Doesn't occur all the time, and it's not something that I can pin point to an Apple Representative or a Genius. I wonder if calibrating would be enough of an solution for me.