You can update the DJI Inspire 3 batteries in the following two ways:

1: Make sure the aircraft has been updated to the latest firmware. Mount the batteries to the aircraft, power on the aircraft and the remote controller. A prompt will appear on the home page of the DJI Pilot 2 app if a battery firmware update is needed. Tap the prompt to update. If there is no prompt, an update is not needed.

2: Connect the DJI RC Plus to the internet. Connect the remote controller and the battery charging hub with the USB-C to USB-A cable. Insert the batteries into the battery charging hub. Enter the battery charging page on the DJI Pilot 2 app. Select battery charging hub update and then update.