First level low battery warning level on my P2 is set at 20% where I have auto return to home set. 2nd level warning where it will auto land is set at 15%. I have tested this with my phantom about 50 metres away and note that at the landing stage of auto return it has already dropped to 15/16%. ( battery has only done 15 cycles). It's would appear that if it went into auto return at some distance from the home point, it would auto land at 15% long before it got home with perhaps the loss of the Phantom (over water?). I cannot see how to alter these levels on the software as there does not appear to be any facility for this. All DJI software is up to date on the phantom and my computer. Any suggestions?