When I first got this phone, the battery was great. I would only charge it every other day. Since the latest update, I have to charge my phone at least twice every single day now. I went to bed at 92% battery last night. I didn't use the phone at all for anything between 11 pm last night and 8 am this morning. It's in do not disturb mode during that time. When I got up this morning, I only had 44% battery left. Nothing looks out of the ordinary when I look at battery usage, but the battery is obviously draining very rapidly.