Answer to: I need help with batteryI've exactly the very same problem with the batteries on two different iphones with two different iFixit batteries.. The battery seems to behave correctly and coconutbattery shows everything as correct. I'll contact with iFixit to check what is happening.
Answer to: "Battery information will be available after using iPhone for a few.."I'm having exactly the same problem after changing the battery on an iPhone 6. Everything seems fine with duration but not battery usage information is displayed. I also tried to check with the Xcode logs to check that but nothing meaningful. I thought it was the battery but since you replace it by an original one, I think is software related someway. Maybe corrupted database...