Battery drain after 15% is instantaneous

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8

2016-12-29 15:00

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M3s has a great battery which sometimes lasts around 2 days..but the only issue is wenever it goes below 15% it drains so quickly to 0..within 2 -5 mins battery will be dead..even if the phone is plugged it dies.Is it only specific to my device or anyone else facing the same problem.