Khan, I. ., S. . Khusro, S. Ali, and A. U. . Din. “Daily Life Activities on Smartphones and Their Effect on Battery Life for Better Personal Information Management: Smartphones and Their Effect on Battery Life for Better Personal Information Management”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, vol. 53, no. 1, June 2021, pp. 61–74, http://ppaspk.org/index.php/PPAS-A/article/view/344.