The life of a battery depends entirely on usage time. It will vary significantly depending on the average daily duration of use and/or alarm duration and/or number of alarms. Turning it on and off unnecessarily also shortens the battery life. If the number of alarms is high, always check the diaper fitment.
Under normal circumstances the battery used in your Snuza® movement monitor should last up to 5 months.
For all Snuza products that use CR2 batteries, we recommend only using Energizer and Duracell primary CR2 batteries (3V).