These battery usage stats in iOS 8 can be a bit confusing. You have to understand that they are relative numbers. In this case, assuming that his battery began the last 24 hour period with a full charge, then Rego’s usage is 14% of the 34% of his battery that was used, or about 5% in absolute terms. - DaFacto
Or.. How to make a useful interface that should make things clearer as confusing as possible for users.