What is the battery lifetime and operational time of my M460?
The Polar M460 has an internal, rechargeable battery. The battery operating time in continuous training with GPS recording and heart rate is up to 16 hours. Battery operating time depends on many factors, such as the temperature of the environment in which you use your M460, the features you select and use (e.g. the use of the front light reduces the operating time), and battery aging. The operating time is significantly reduced in temperatures well below freezing. The use of compatible sensors, and frequent syncing with Flow app will also decrease the battery life.
The operating temperature of M460 is -10 °C to +50 °C/14 °F to 122 °F. Using or storing your M460 in an environment where temperature is not within this temperature range may permanently damage the battery capacity - especially if the temperature is higher.