About a year ago I suggested my friend to buy samasung galaxy j2. Now he is thankful to my suggestion.
Battery: he is using 4g internet connection so his battery drains away quickly but in offline the battery back-up is very good.
Display: no doubt display is totaly great super amoled display.
Camera: I always prefer samsung after i-phone to take high quality photo. its thickness is low so the mobile looks more smarter and the glow light of the camera is totaly amezing. One is bad of samsung that it started hanging after 1 or 2 years but till now this phone didn’t hanged yet.