Hey buddy, your battery sounds awful to me too...... Did u use other charger? Or did u overcharged it? If u didn't do any of the above mentioned questions, then u should definitely ask for replacement, it must be a detective battery. Or try doing a factory data reset first............ Actually m planning to buy note 4 in few months after my exams are over and after its price falls......
I am using the default charger . For now it seems a factory reset fixed my issue but I have nothing on my phone really atm
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