I can't figure out the battery remaining time on my nexus 4. When I charge it and view the battery later it gives me conflicting times. 99% = 1hr 40 mins 98% = 19hrs 27 mins 98% = 29 mins This is on the battery app itself. Checked battery in settings. This also says the same. How do I know how long the battery will last if I go out? Am getting wary about using the phone.