haven't really had a chance to test it out for a full battery yet ,but for my first proper flight today before rain stopped play i flew for 23 minutes ,and landed with an indicated 55% remaining charge, and according to the remaining flight time indication on the screen another 20 minutes left before forced landing, during the flight which had bypass turned on, i took 8 photos and just over 15 minutes of video as i flew around ,of course these times will vary considerably,due to many factors ,but once the batteries have bedded in then i feel that 30 to 35 minutes down to 25% should be doable in good conditions