Every week or two, the battery on my smartphone will start draining really fast until I restart my phone. Of course, I always seem to notice that the battery is dying when I’m working out and don’t have my hands free. So, I end up not having any music for the last part of my workout. Not a big deal since I know what the “fix” is. But, kinda frustrating if it happens when I’m in the middle of doing something for time.