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Longer flight time is one of the hot research areas in the field of quadrotor UAVs. The study of transient current consumption and battery voltage during actual flight showed that battery power consumption is significantly higher at large tilt angle. In order to extend the flight time and improve the efficiency of battery power usage, a long battery life mode is proposed. Based on the existing angular velocity cascade PID controller, the acceleration-controlled algorithm is changed to velocity-controlled algorithms, and excessive tilt angle requested by the drone pilot is ignored. Flight experiments in windless, breeze and strong wind conditions have shown that the long battery life mode increases the flight time by 8% to 20% compared with the traditional mode. The proposed mode can be used in a variety of application scenarios where a longer flight time is required without a quick change of flight path.