Q: We used the Ydoc Power Consumption Calculator (available here) for the necessary battery capacity.
After a while, the batteries run out quicker than expected according to the value found in the calculation tool.
A: Check the log file on regular base for WDT messages.
WDTs are causing extra strain and will drain the batteries. Search for the root cause and reconfigure the data logger.
T: Enable battery protection and monitor power consumption, especially on battery powered Data Loggers.
Check this FAQ to setup a Power Monitor for the Data Logger.