Ive been getting 12-15 min on stock 7 cell and 10-12 on 8 cell with mixed flying. I had one flight of 20 minutes where i would climb as high as i could and then glide in a huge circle down to around 15 ft and then climb again and do it over. The batteries are reasonably priced 20-25 bucks, so just get a few and charge them up with the wall charger- 1 1/2 hours or the car charger in about 45 min. Just get the cub and then experiment with batteries. You won't be dissapointed.