We used this phone for fun and work extensively and couldn’t drain it in a day no matter what. When using the device regularly, it can last up to two and a half days, maybe more, depending on the usage and signal reception. Another ace up its sleeve is the Qualcomm quick charging 3.0 technology. With the use of this tech you can charge this large battery in less than two hours and that is really impressive. Xiaomi Mi Max is indeed a terrific performer in this regard