I glanced at the Odyssey website, and did not see any information about aircraft batteries, but I could have overlooked something.
If Spruce's info is not accurate or outdated, I'd like to see the current or corrected paperwork. I have seen a few instances where a supplier had outdated information in their catalog or on their website.
HERE [
odysseybatteries.com] is the current PMA list that they have on their web site.