Asus Zenfone Max is the best smartphone in terms of battery life in its Price range t buy. The battery is non-removable and easily lasts for 2-3 days with normal use.
PROS: 5000 mAH battery, 13 MP rear Camera with dual-tone LED FLASH and 5 MP shooter at Front. 5.5 inch IPS(720*1280) DISPLAY. Sturdy Looks, Qualcomm Snapdragon 650 SoC. which is very efficient as I was able to play heavy games from playstore such as asphalt 8 and nova 3 etc.
CONS: -The phone has Non - removable battery.
-The phone doesn’t have Full HD display unlike other phones at this price range.
-No Fingerprint Sensor.
The phone is available in 2 variants such as( 2gb RAM- 16GB) AND(3GB RAM-32GB).
I have bought 2GB VERSION as I m going to use for only an year but if u want to use for more years then I would prefer u to take 3GB RAM variant. Thanks.