How long does it take battery to reach 25% from 100% on the Samsung Galaxy Note 4?

I have a brand new Galaxy Note 4. With Wi-Fi on and data on and a phone call asking about 45 minutes, should my battery being drained to 75%?




Looks like it's time for a battery replacement. Was the phone like this before or do you notice deteriorating performance in battery life? 


That was supposed to say a lasting 45 minutes not asking 45 minutes. Using voice text, sometimes it's annoying.



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