I took my new P1 out to fly with a stock battery I received in Jan 2015 with my second P1. The Phantom was bare. I start the clock when I plugged the battery in. Got sats fairly quick....did a compass dance...flying was mild but did a few things. I got my first red blink at exactly 15 minutes. Hand caught. Very stable...calm wind. With a cell checker ....the cells read 3.66 volts and 9 %. I have no complaints with that.