Thanks for your feedback. Our JBL Flip 6 has a playtime of 12 hours. However, it is important to consider that playing music with heavy bass or increasing the volume may decrease the playtime. Since you're experiencing a shorter battery life than expected (4 hours), please contact us for further assistance with your JBL Flip 6.

Thanks for your inquiry. Please check the equalizer settings of your phone and set it to default. We also recommend trying to connect it with a different device or play audio using a different application. You may also try doing a Factory Reset by pressing and holding the Volume up (+) and play buttons until your JBL Flip 6 turns off. If you need more help, please contact our customer support.