I am using red mi note 4 from last 5 months it’s really superb phone, battery of this phone really nice.i charge this phone at the interval of 2 days.battery going very long lasting.i used to use social networking sites and even of it battery capability is really very good.it has inbuit battery.so it’s also a very good plus point.phone also take less time for charging also.i really appreciate the battery backup of this phone.there is 41000 mah battery which is long lasting then red mi note 3.and other specification also very good