Equations for current draw and battery life calculations:
Current draw from logger without sensors:
\( I_{\text{log}} = \frac{P_{\text{l}}}{V} \)
Current draw from all sensors when continuously powered:
\( I_{\text{s}} = \frac{P_{\text{s}} \cdot N}{V} \)
Average current draw from all sensors when temporarily powered for \( T \) seconds before taking \( F \) samples over a 24-hour period:
\( I_{\text{s(av)}} = \frac{P_{\text{s}} \cdot N}{V} \cdot \frac{F}{24} \cdot \frac{T}{3600} \)
Total Average Current:
\( I_{\text{av}} = I_{\text{log}} + I_{\text{s(av)}} \)
Battery Life (hours):
\( \text{Battery Life (hours)} = \frac{E_{\text{mAh}}}{I_{\text{av}}} \)
Battery Life (days):
\( \text{Battery Life (days)} = \frac{E_{\text{mAh}}}{P_{\text{s}} \cdot N \cdot F \cdot T / (3600 \cdot V) + 24 \cdot P_{\text{l}} / V} \)