How long do RC helicopter batteries last per charge?

Micro and toy-grade models typically advertise 5 to 8 minutes per pack, with kits often including two batteries for around 30 to 40 minutes of total flight, as seen on the SYMA S107H-E and similar models. Larger collective-pitch helis like the Fusion 360 run on 4S LiPos with flight times that vary heavily based on headspeed and flying style.