Just curious. I want to pick up another battery, and I remember a thread that said you could leave the .bin file on the micro SD card incase your battery ever needed the FW updated. I have a brand new P3P, and have not updated either the AC or RC. Both are working great, so I don't want to change a thing. If I buy a new battery, could it possibly need a FW update to function, and if it would, the only place to get it is from the micro SD card, which would cause a FW update of the AC. I just don't want to start down that rabbit hole. Too confusing.....