Today we released a new Software Update for the Rally 100/200 version 4.00. This update can be downloaded through Garmin Connect Mobile or available through a compatible Garmin Edge/Wearable when prompted.
Changes made from 4.00 to 4.10:
• Fixed issue causing battery status reporting to not work as expected
IMPORTANT: Before installing a software update, Garmin recommends that the batteries be replaced in your Rally pedals if they have not been recently changed. The software update may fail to install if the batteries do not have sufficient life left.
Rally Pedals Software Update Instructions