Hi, I'm getting ready to buy a second battery for my Phantom 3 Standard and wanted to know how to prevent the battery from forcing an upgrade to the latest firmware (1.6.8). I'm currently on firmware 1.5.7+ and have the latest DJI Go App on iOS. Everything works perfect, I get the range announced by DJI on it's website and don't want to upgrade to 1.6.8 for fear of all the "horror" stories I have read on this and other forums related to range of that firmware. I'm assuming that, if the battery firmware detects that I'm one firmware down from the latest one and "wants" to upgrade, that I can force it not to and to stick to 1.5.7. Does anyone have any experience with a scenario like this ? Thanks!