With every passing day and more features being added to smartphones, the biggest concern that rises is flawed battery stamina. We resort to numerous makeshift measures like switching off data, decreasing brightness, carrying around power banks, or fit big, bulky battery cases on the slim, petite devices. Here&#39;s listing the best devices within Rs. 15,000, that will get rid of all the excess paraphernalia, and give you great battery life. Happy gaming!