i’ve bought meizu m2 for a month. and also try upgrade firmware with F5.1.6.0G and the last is F5.1.8.0G, but i’m still got draining battery when the percentage reach 30% drain to 14% just a minutes countdown. even though i’ve doing factory reset and wipe app data before flashing that both firmwares. Please for who know this problems. give me the solution for sure. Thanks