We'd like to work with you directly to address the issues you're experiencing with your unit. Please contact our customer support team via this link: https://support.jbl.com/us/en/#contact

Thanks for bringing this to our attention. We would like to work with you directly to address and know more about the issues you're experiencing with your JBL Endurance Race 2 and provide accurate troubleshooting steps. Please contact us.

Thanks for your feedback on our JBL Endurance Race 2 TWS. We recommend cleaning the contact pins on the case and earbuds using a cotton swab with alcohol. Charging issues are frequently caused by foreign matter on the metal charging contacts. This can include sweat, grease, ear wax, etc. Please ensure the pins are dried before placing them back on the case. If cleaning doesn't solve the problem, the next thing to check is the balance control by checking the balance control on your source device by going to the "Accessibility" settings, on your music player app, commonly found in the playback or EQ settings, and the balance control on the JBL Headphone App. Lastly, try to connect the headphones to a different device (phone/tablet/music player) to see if it fixes the problem. If the troubleshooting steps do not work, please contact our customer support.