I've been using a stock Phantom 3 Pro with Phantom 2 blade guards (they fit ok and was what bhphoto had when I ordered my drone). However, I was getting ~11-13 minute battery life!?! It's been windy a bunch where I'm at though, but still. I could always see the guards dip into my video when going full speed; sometimes the guards tip would be half way into the video. So I decided I'd try these carbon fiber blades, but this time ditched the guards (since I've flown 20-30 times now). I couldn't believe the increase in battery life at over 18 minutes of flight time (landed with ~18% battery left too) with light wind. Then I decided to try the stock blades and got a little over 17 minutes after the wind died down. Any thoughts? Have others noticed variances in battery life when using guards?