On Tuesday, January 5, 2016 at 11:00:07 AM UTC-8, soarin wrote:

Can you post a link to the factory approving data that authorizes the
switch from the SLA to LifePo4 batteries?

No. As with the hundreds of gliders using LFP batteries for instruments, it is a substitution made at the owner's discretion and rules interpretation. The SLA battery supplied by the factory is a hardware store battery, not TSO'd or otherwise qualified either. In the case of the ASH26E, the specific battery originally supplied is no longer available and has been already replaced several times.