The Automatrics MTrack 4 model battery should last 12-18 months in the standard 6 hour sleep cycle. Customers can extend life by requesting a longer sleep time say to 12 hours 


The Automatrics MTrack 4+PLUS model has a double battery pack and should last 24-36 months in the standard 6 hr sleep cycle,


The main reason for variance in battery life is attributed to the mobile signal strength where the asset is stored,  in a poor mobile reception area the unit will use greater power levels to connect,  so in these conditions you could expect the lower end of life range.


We contact customers with low battery warnings, the system is configured to signal low battery warnings to customers approximately 12 weeks before a recharge or replacement battery is required.