These are the best smartphones you can consider buying, with no budget or brand limitations. The smartphones with the best battery performance scores – Apple, Xiaomi, Samsung, and OPPO are at the forefront. Having tested numerous smartphones in the ViserMark test labs, using various testing criteria, measured using real-life scenarios and live networks, results are collated with that amount to the total score - the Battery Performance Score.Smartphone manufacturers have been busy this year, rel