Long ago iPhone was better. Even my iPhone 4 was far better than my iPhone 5s and iPhone 6. Both of my iPhone 5s and iPhone 6 battery spoiled. Surprising thing is that, I had an Galaxy S5 which I offed for 6 months and when I charged it again, it works and battery works smoothly. I bought Galaxy S5 during iPhone 5s to test my android apps. Though I don’t like samsung, as 2 of my Samsung phones Galaxy S7 and Note 5 also dead. Right now I am using mainly Honor from Huawei and I am happy for its charge retention.