They have a large list of STC's pending, Diamonds are not on the list, not sure why. Some from here should contact them to push for all Diamond aircraft models to be added as well. These are great batteries, great cranking performance and longevity, they are well protected from over charge and over discharge. I use this battery type in my Glasair about 5 years now. They are also **VERY MUCH** lighter weight than ANY/EVERY type of lead acid battery.
Other than also using their products, I have no other connection to this company. They do offer both 12/14 and 24/28 VDC batteries with different capacities/sizes for each Voltage. I won't EVER go back to a Lead battery of any kind.
Note: Mike and Mark Patey both use them in their aircraft.
https://earthxbatteries.com/list-of-stcs/
https://earthxbatteries.com/wp-content/ ... signed.pdf
EarthX Batteries STC's approved / pending - LIFePO4 battery Chemistry
Moderators: Rick, Lance Murray