There are a number of variables that go into the answer to this question:
- GPS signal strength
- Cellular signal strength
- type of cellular (2G, 3G, etc)
- make of batteries used
- environmental factors (eg excessive bumps causing accelerometer wakeups)
We can provide some indicative numbers of the uploads that we get in accelerated upload testing:
Uploads @ 24 deg C
Uploads in Fridge
Uploads in Freezer
|2G, Energizer Ultimate Lithium
Note that this does not include getting a GPS fix, so you should adjust these numbers down by approximately 15%.
And of course, nothing beats testing the devices in your real-world application.
We also recommend using fresh Engergizer Ultimate Lithium batteries, or other reputable 1.5V Lithium batteries.