Trade-off Between Smartphone Battery Life and Stop Detection Accuracy Kalan Nawarathne, Rudi Ball, Francisco Cˆ amara Pereira, Fang Zhao Singapore-MIT Alliance for Research and Technology, Future Urban Mobility 1 CREATE Way, #09-02 CREATE Tower, Singapore 138602 Tel: 65-6601 1547 Email address: {kalan, rudi.ball, fang.zhao, camara}@smart.mit.edu Atika Diana Rahardjo National University of Singapore 21 Lower Kent Ridge Road Singapore 119077 Email address: {a0071387}@nus.edu.sg Christopher Zegras, Moshe Ben-Akiva Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, MA, 02139 Telephone: 617-253 5324 Email address: {czegras, mba}@mit.edu