The B54DataField connect Garmin with the Supernova B54 battery via Bluetooth. Its the actual beam mode and the remaing runtime for the current mode in minutes. If you change the mode the remain runtine will be updated. Please ensure that the battery ist not connected to the B54 smartphone app. The battery can only be connected to a single device.
The B54DataField now supports the new B54MAX headlight. Also Edge 540, 840 and 1040 now supported