The main highlight of Vivo Y15 is its 5000 mAh battery that offers extended backup. The display is of HD+ quality, which ensures even higher backup than phones with Full HD+ or higher quality screen with similar size. It is because display size, quality and brightness play a vital role in the backup as they usually consume the most about of energy. Speaking if it, you may prefer a Full HD+ screen over a bit higher battery performance and to be honest HD+ quality is a bit unexpected nowadays for the price tag. But one needs to make a priority here. 6.35&Prime, screen is a plus point considering it widens the view for overall everyday usage. The so-called mirror finish on the back with trendy waterdrop notch design makes it a desirable choice.