Keep up the weight savings program you have going, Carl! You have knocked off almost 90 lbs with your MT prop, carbon fiber cowl and now the battery too!
Unfortunately I put in a new Concord less than two years ago.
Carlee, you posted in 2020 about the EarthX battery it just got certified for 12V commanders this year July 2024 and I just installed one in my aircraft 114A N411DP. It's an amazing bit of kit, I've never had my engine crank so well I've got top notch compressions and the dear old Concorde sometimes would not turn the engine though the first compression I would release the key and catch it on the rebound and that would take it through and I'd get a start. The warning light cable is a pain to install but altogether well worth the effort. Cheers David FAA A&P/IA in Spain