To update the firmware on your , you primarily use the JBL Portable app (formerly JBL Connect) . The current latest firmware version for the standard model is 0.8.9.0 , released in January 2025. How to Update via the JBL Portable App
During this phase, the speaker may make strange sounds, or the lights may blink erratically. Do not touch the power button on the speaker, and do not close the app on your phone. Interrupting this process can corrupt the speaker's software. update jbl charge 5 firmware