DJI failed to mention in the release notes that a battery update was also included in the latest firmware. Your battery installed during the update will get the battery update as well. But in order to update your additional batteries please see this simple process courtesy of Lynh Phan over at Drone Owners Network.
How to update DJI Phantom 4 batteries FW01.01.0410.
How to update DJI Phantom 4 batteries FW01.01.0410.