So I’m using the app, Battery Life, on this new iPhone 8 I purchased in October. Awesome phone, no complaints. I check it maybe twice a month and things seemed to be in tip-top condition. January 15th, battery life 100%. Nice. Fast forward to yesterday. Was bored on the train and just wanted to fool around with the app. Battery life now 92%?! How does the life of a battery decline 8% in 15 days? Anyone else experiencing this type of decline on the 8/8+ or the X?