Use the attached spreadsheet for to determine rough estimates for battery life for the Oyster Cellular. The results cannot be guaranteed. 

Note the option to select battery chemistry: LiFeS2 vs LTC

Note the average time to GPS fix varies with the logging period - more frequent logs means that the GPS module is downloading fresh aiding data, and stays 'hot', so it will more easily acquire a subsequent fix. 

In general around 60s for a 'cold' start (logging period above 2hrs) and 8-12s for a 'hot' start (logging periods below 1hr)

You can also enter your real world device data from the Device Counters saved in OEM (average this across a few devices) to get a more accurate estimate. 

The counters are at the bottom of the page: