The battery life on my Honeywell Doorbell did not last the specified duration.

The battery life specified is calculated on typical usage using good quality alkaline batteries. Heavy usage and/or use of unsuitable batteries for example low quality Zinc will reduce the operational life from batteries.

The battery life of alkaline batteries will also be reduced if they are used in a hot or cold climate. For the longest battery life, use the doorbell within a temperature range of 5 to 25 deg C.