LabPro battery life depends on the number and type of sensor being used as well as how frequently data are being collected. Below you will find a chart that summarizes battery life under a variety of conditions.

Sensor Used Low-cost 6V Batteries
Duracell MN908
Eveready Classic 509
Eveready Energizer 1209
Higher-quality 6V Batteries
Duracell MN918
Eveready Energizer 528
Eveready Energizer 529
CO2
DO
EKG
FLO
PH
The expected life is 72 hours with the exception of CO2 (will last about 54 hours).
Since the power is always on, the data rate does not matter.
The expected life is 160 hours with the exception of CO2 (will last about 120 hours).
Since the power is always on, the data rate does not matter.
All other sensors 1 sample/minute = 90 days
4 samples/hour = 162 days
1 sample/hour = 180 days
1 sample/minute = 200 days
4 samples/hour = 360 days
1 sample/hour = 400 days
Note: You could also make a battery pack out of four D cells. The battery life (using rechargeable) will be close to a low-cost 6V lantern battery.
Note: When collecting data over many days, the battery life will be greatly effected by temperature. Very cold or hot temperatures could easily reduce lifetimes by half.
Sensors Used Four AA Batteries
CO2
DO
EKG
FLO
PH
The expected life is 8 hours with the exception of CO2 (lifespan is about 6 hours).
Since the power is always on, the data rate does not matter.
All other sensors 1 sample/minute = 10 days
4 samples/hour = 18 days
1 sample/hour = 20 days
Note: In most cases, battery life values have been calculated and do not come from real-world testing. However, they are on the conservative side. They assume you are using DataMate and are running in minimum power mode (not graphing or actively monitoring the input). Results will vary depending on temperature and type of batteries used.