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My iphone battery dries too quickly sometime And sometime when i putt my phone on charging it quickly charge 3% to 15% and it takes only 3hours to dry 100 % battery level And in battey health maximum capacity of my iphone battery is 89% can you tell me that what is the main problem ?

this sounds as if the battery has started to fail. If its still within the warranty period I would go back to Apple, alternatively you could buy a replacement here which will be a good quality replacement. Spam removed