Remember that battery life is affected by screen brightness as well. Your performance will vary, for example, with use indoors versus outdoors since you'll need more brightness to overcome the effects of the ambient light. YMMV

Battery technology, these days, is such that it is not recommended that one always seeks to maintain a 100% charge nor routinely permit the phone's battery to fully discharge. It's now recommended that you "keep the juices flowing" for better battery longevity. The battery circuitry of the...