Hi ChienJames86,
Thank you for using the Apple Support Communities! I understand your Powerbeats 3 Wireless headphones are no longer powering on. I'd like to help out.
Based on the details shared, there is a charging and power issue going on with your headphones. I would suggest trying to charge your headphones using a different power source and a different micro USB cable. This will help rule out if a charging component is failing to charge your headphones properly.
If you notice the same behavior with a different power source and cable, I would suggest resetting your Beats following these steps: Reset your Beats earphones.
If the issue remains unresolved after the above steps, please reach out to Apple Support to discuss next steps: Contact - Official Apple Support.
Thanks for your post!
Take care.