Question about Nothing Phone (1) (12GB)

Question about battery life: For a few days now, my battery has been draining very rapidly. Example. Charged in the evening, not used overnight and still 55% battery in the morning. Unfortunately, the battery usage does not provide any information as only the last 3 hours are displayed. The phone is only about 4 months old. Does anyone have similar experiences? According to tests, the battery should last a long time. Did I get a "Monday model"?