I have an iPhone 6 plus with a third party battery in it. Lately, I'm having a hard time making it through the day on a full charge. I was considering replacing the battery but I'm not sure if it's the problem. I had the battery installed about 9 - 10 months ago and the battery information page in iOS 11 wouldn't show any battery activity details. I'm now on iOS 12 and the battery details seem to work but the health says "Service" and it shows a maximum capacity is 65%. However, I had a look at coconutBattery and iMazing who reported 93.8% and 96.6% max capacity... I'm wondering which one is accurate?