Zenfone max with its 5000 mah battery and and great laser focus camera it is rocking the market right now. It comes with 2gb ram and 16 gb internal and zenfone 2 ui. Its processar is also quite good it is snapdragon 410 64 bit processar.
It doesn’t have marshmellow right now it is available in Android 5.0 lollypop version. Camera quality is satisfactory rear camera is 13 mp and comes with precise laser focus. Front facing selfi camera is also good camera app comes with many useful handy features like time lapse, low light, slow motion, beautify etc.