I let it go for the night. Battery at 20% just before 9:00pm. Auto off at 9:00pm and auto off at 5:00am. Checked phone at 6:00am and it was dead. I almost freaked out. Would not turn on. Plugged it into charger and it kicked on. Battery low indicator and wireless was off. I never had this happen before. 20% usually gets me to the morning (every two ays) and that's when I usually charge my phone.