So I just purchased a non-DJI battery for my P3S (expecting it this Saturday), then read that it may not work. Then I also read that it WILL work if I use the Litchi app (I currently use DJI Go app). So, I guess I would like to know two things from users that have experience in this situation, (1) if the new battery doesn't work in my P3S should I invest in the Litchi app which is $23 in iTunes or (2) return the battery and pay for the more expensive DJI-branded battery.