This is a budget Phone for us. Battery must be more powerful as 4000mah.but no worries its battery life is same as 4000mah. I recommended this product. it is a very good smart phone at 15k. Its processors is also very good no lag in heavy apps and games. I personally recommend this product to every and each person. I don’t think other companies will give u this kind of performance at 15 k price segment. And the beat thing is it is a stock android phone which gives u monthly security update and u will get android p very soon.