Hi there Idontknow2367,
It sounds like your Beats Flex earphones aren't charging as expected. We're glad you've joined us in Apple Support Communities, and we can provide some guidance.
To start, what are you seeing from the LED indicator light currently? For example, is the light white, red, or blinking red? Did you follow the steps below to reset your Beats?
"1. Press and hold both the power button and the volume down button for 15 seconds.
2. When the LED indicator light flashes, release the buttons. Your earphones are now reset and ready to be set up with your devices again."
Have a look at this support article to learn more:
Set up and use your Beats Flex earphones
If resetting doesn't seem to help, try using a different charging cable and let us know how it goes.
Cheers.