On Wednesday, February 26, 2020 at 1:13:46 PM UTC-8, Shaun Wheeler wrote:
L33 solo.

This may be of interest:
http://jdasolutions.aero/blog/faas-p...val-standards/

https://www.aviationpros.com/engines...es-in-aircraft

This is a TSO'd 12V battery:
https://earthxbatteries.com/product-...ified-aircraft

To get approved it looks like any lithium ion battery will need a hardened case with venting to the outside of the A/C.

Tom