I bought my phone from *******. Since the first day the charging time of the phone is 7,5 hours. Even after unlocking the bootloader, rooting and updating the phone. (I'm running MIUI 7.3 by xiaomi.eu 6.3.3 beta). I tried dozens of cables and chargers, including the original charger and cable which came with the phone. Does anyone have an explanation for this? And more importantly: is there a solution?