I received a replacement 945 on the 24th. I've been busy with the holidays and finally got around to connecting all my sensors to the new watch. All connected fine, but 4 of the 6 sensors I have gave me a low battery notification. I didn't have any notifications on the 23rd with my watch on the old FW. Is this just a coincidence or possibly a problem with the new watch? The new watch updated to FW 4.00 as soon as I took it out of the box and I connected it to Express. Anyone getting these notifications with the new firmware?