Hey there, Seth!
Thanks for dropping by the Apple Support Communities. I see from your post that your Powerbeats3 wireless earphones will unexpectedly power off. I'm happy to help!
First, make sure that you've charged the Powerbeats according to the following directions from Set up and use your Powerbeats3 Wireless Earphones:
Plug your earphones into a power source using the included micro USB cable. Your earphones provide up to 12 hours of playback from a full charge, and up to 1 hour of playback from a 5-minute charge.
When your earphones are turned on and set up, the LED indicator light on the left earphone shows how much listening time is left:
- White: Up to 12 hours left
- Red: Less than an hour left
- Blinking red: Needs to charge"
If you're fully charged and still experiencing the unexpected powering off, try resetting your earphones using the Powerbeats3 section of Reset your Beats earphones.
Cheers.