After opening the case everything needed an update. i1, Rc, and 2 batteries. First attempt I couldn't figure out what was happening. 2nd try worked after I gave it some time (20 minutes) to figure it out. Had to use USB cord to camera to get update to first RC. (used a stick USB card reader to hold the microSD card in the USB slot on the second RC.) Now new 5700 batteries need updating. Will have to dig out micro SB card with .bin file update on it. Will I see and update txt file for each battery? How will I know which file goes to which battery?