Phantom FC40 with everything stock. Hi there - I got an FC 40 about a week ago and have been enjoying it since. However, my flight times seem to be very erratic, mostly cut short by low battery lights. I have two standard batteries, 2200mAh. Although I have achieved in excess of 10 minutes flight, I'm now finding that for testing purposes, simply hovering above the ground, the battery low lights are coming on at about 2 minutes 30 seconds and then it auto lands a short time after. I have seen this sort of time with both batteries. I am charging using the BC-20-4 and use the 1 A setting and Lipo and have both leads plugged in. I always wait for it to turn steady green before detaching the battery. Sometimes that might mean the battery is in the charger overnight, but I assume there's no harm in that. I have a battery level checker ordered so that I can see what is in each cell. Any helpful advice ? I'm interested in what the best settings are in the software for the battery levels and how I can set them to give prolonged battery life - in order words, not to run it down beyond 80% discharged. Thanks - Damian.