Thanks never happier to lose a battery.After opening my Christmas present, a Spark I was on my 6th flight and first time trying sport mode same thing the battery dropped out mid flight. I never found the battery amongs the leaves and mud I. The woods. I retrieved the Spark. Complained to DJI because I found out this is a problem with some Sparks. They said send it back. They replaced the spark and gave me a new battery. I have bought a battery strap and don’t fly without it. Glad you found it.