How long will the ModuLogger run from its internal batteries?
This depends on the application, but in many cases the ModuLogger will run for up to 6 weeks off a new set of alkaline D-Cells (optional battery pack). Also, an external low-voltage power supply (wall transformer) is provided with the ModuLogger which will power the unit indefinitely. And if the utility power fails, the ModuLogger will automatically transfer to battery power.