This is question that related on battery usage and we need some opinions for some iPhone 4 user. That's I mean which one better and the best recommendations. Like we all knows, that iOS have some triggered that if we used our iPhone and battery remaining under 20% or less we will got message. Our question is simple. Which one better? A. Charges our iPhone whatever we need and want it keep our iPhone battery Above 20% each day and only drain our battery use it until below 20% one time each month B. Use our iPhone and charged it only our battery below 20% or less Which one the best and Apple recommendation?