The K-IP beacon indicates its autonomy capacity as best it can, depending on the conditions to which it is subjected. Its percentage of charge can go up or down without charging. This is related to the external temperature conditions. The battery does not hold the same charge when it is in an environment at -10 °C and +30 °C. You will notice that in cold weather, the K-IP has less autonomy than in hot weather. Because of this, the percentage varies. 😉