Hi @vann3th ,
Was the red light still flashing just before you went to try it?
If so then perhaps the battery didn't charge because it may have been discharged too far.
Try the following:
Connect it to the charger and leave it on for 3-4 hours to see if the red light changes from a flashing light to a steady light.
Sometimes it takes a while for the battery to "kick in" again and begin charging again after it has been discharged too far.
If it still doesn't charge after this then perhaps the battery has failed and needs to be replaced.
Verify how long that you've had the speaker, just to see if it may still be covered by the manufacturer's warranty. Check the warranty statement to see that the battery is also covered for the same amount of time as the rest of the speaker as sometimes with certain devices (and manufacturer's and location) it is not.