damaged battery

Hello Autel Family My EVO 1 is 12 months old along with the 3 batteries and has 10 or so flights on it (never crashed or hard landed) Last weekend I went up for a routine flight at the beach. Once I got over the water I got the "Damaged Battery Warning" and lost complete control on both...

This may not help everyone but it's my new way of determining if my battery is going bad. We all know swollen batteries are a sign of bad or going bad. I had my second one go bad in flight and got the Damaged Battery notice before it tried to return home. Looking closely at all my batteries I...