FWIW I got the replacement Serfas Shield last week - they clearly shipped the replacement before they got my original back again, simply on my word via email that I was shipping it. Good customer service there. The package was hand addressed.

It hasn't been raining here lately so I haven't had time to try it out in the rain and see if this one is weather proof or not.

BTW I did ask and they said that despite not being mentioned in the ad copy, the Serfas Shield is intended to be water resistant, essentially "weatherproof" though clearly with a USB charging port it should not be submerged and the cap should be kept on.