Hey i am using iPhone 6 and i recently upgraded it to iOS 9.2 and after first charge im experiencing a decline in battery life, i am pretty sure its the new software problem otherwise it was working perfectly in the past versions of iOS please help!!

Hey i am using iPhone 6 and i recently upgraded it to iOS 9.2 and after first charge im experiencing a decline in battery life, i am pretty sure its the new software problem otherwise it was working perfectly in...
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