Which is the best brand of smart phone under Rs 15000 having good battery life and having a rear and front camera?

you can simply go for lenovo k3 note, yu yureka or smply blindly you can go for Microsoft lumia products if you increase budget by 4000 so u can go for motox play too.

Hey,
Here is a list of phones that are the best in terms of battery and have an amazing camera quality and are below 15K.
Micromax Canvas Knight A350
Asus Zenfone 2 ZE550ML
Motorola Moto G (3rd Gen)
Micromax Canvas Play 4G
Xiaomi Mi4

Buy this phone at the very best price at Pricejugaad.com. Here you can Compare this phone with other phones in its category and also find relevant user reviews which indeed helps in choosing the mobile.

Hey – The Honor 4X has been getting a good review about its battery life. Here is an interesting video for you to watch. The price is much below your budget!!!

Expand your budget a bit more and you can get Honor 6. Great phone with great specs, future proof as well.
Good battery, camera, screen, processing and RAM

You should have a look at Asus Zenfone 5 , 6...both are value for money

i think u may go for yu yureka the best at its price 8.9k
available through flash sale in amazon