Max capacity of my iphone battery after 7 weeks (Date of purchase: 20 september 2018) and 21 cycles is 98%. CoconutBattery show designed capacity level at 97.3% (fully charged phone). I don't overheat my phone and follow rule 20-80 - I don't play games, use facebook etc (nothing heavy). It seems to me that the battery is discharging a little faster. Is it normal?