Power consumption measurements taken 6 times using 3 different SD cards.
Calculation of run time, in hours, used the worst-case measurement among the
6 tests. Run times are rounded to the nearest 10 hours.
These figures make the following assumptions:
- Room-temperature (20 °C) conditions
- Uncompressed .wav recording at 24 kHz sample
rate
- Two acoustic stub microphones installed, no other external microphones
attached
- Energy capacity of 4 alkaline D batteries: 72 W h
- Energy capacity of 11 Li-ion 18650 batteries: 137.5 W h