Are you sure you were saving to the SD card and not the devices internal memory?
The battery going dead should not have lost your footage
Use a file recovery application such as PhotoRec. Obviously we don't know if anything was in fact saved. But if something is there, it might see it.
~Rick
Bay Area - CA
~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
