To maximize battery life, some key parameters should be applied for maximum battery life. Make sure to see the Critical Parameters

Please be aware that these are estimations, and can be influenced heavily by factors such as:

• Application and configuration: The battery life is dependent on the update rate and other settings
   
• GPS reception: If GPS reception is poor, the device has to work harder, and keep its GPS module on for longer to get a fix - or it may time out and fail to get a fix, draining additional battery.
   
• SIM Card Selection: Some Roaming SIM cards can trigger lengthy network scans, using up a lot of extra energy, see Roaming SIM Cards - Battery Life Impact
   
• GSM Reception: As for the GPS, the same applies to the cellular modem attempting to connect to the network
   
• Mounting position: This will impact GPS and GSM reception
   
• Battery type and chemistry: Different batteries are of different quality and capacity
   
• Temperature: Extreme temperatures reduce the lifetime of most battery types.

*We would not ordinarily configure a device for 24 updates per day using periodic tracking (i.e. hourly updates). We would use 'smarter' adaptive-tracking features. See Changing the Update Rate - Barra GPS

When in this mode, the battery usage is ultimately dependent on parameters and also how long the device spends on a trip.

Use the calculator found at the top of this article to estimate battery life.

Trips Per Week and Average Length of Trip are required when in movement-based tracking mode - the update rate is increased (using more energy) than when stationary. 

Upload Period in Trip: The time between uploads when moving

Log Period in Trip: The time between location scans when moving

The picture details the calculator being used to determine the battery life if a device is performing 1 trip per day for an average length of 4 hours. The logging and upload time are set per the default parameters (2-minute logs; 30-minute uploads)