This may be due to the type of batteries you are using. Ensure you’re using high-quality, name-brand (e.g., Energizer, Duracell, or Panasonic), alkaline batteries.
If you’re using the correct batteries, next make sure the deadbolt extends properly. Changes in temperature and humidity may cause some doors to become misaligned, leading to the deadbolt not extending smoothly into the strike hole. This forces the motor in the lock to work harder, which drains the batteries faster. Adjust the strike plate (or lock, if possible) so it allows the deadbolt to extend smoothly.
Still having trouble? Give us a call at 1.800.PROTECT (1.800.776.8328) for further assistance.