Following a couple of recent reports involving Mavics suddenly shutting down completely in flight, diagnosed as improperly fitted batteries, my first tip would be to make absolutely sure that your battery is firmly retained by both clips before flying.
My second would be to remember that when flying downwind in anything more than a gentle breeze, your battery power could be consumed at a much faster rate on the return leg.
My second would be to remember that when flying downwind in anything more than a gentle breeze, your battery power could be consumed at a much faster rate on the return leg.