Average current = weighted mean across all power states in one duty cycle
Battery Configuration
mAh
Accounts for temperature, aging, and cut-off voltage. 80–90% is typical.
Usable Capacity
1700 mAh
Estimated Lifetime
—
—
Average Current Draw
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Power States (one duty cycle = sum of all state durations)
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How to Estimate IoT Battery Life
Battery life for embedded devices is determined by the average current draw over a full duty cycle. A duty cycle consists of one or more power states (e.g., active TX, idle, deep sleep), each with a defined current and duration.
The formula used is: Average Current = Σ(In × tn) / Σ(tn). Battery life is then: Lifetime = (Battery Capacity × Efficiency) / Average Current.
Tips for Maximising Battery Life
- Minimise active/TX time — radio transmission typically draws 10–100× more current than idle.
- Use the deepest available sleep mode (e.g. ESP32 deep sleep ~10 µA vs active ~240 mA).
- Apply a derating factor of 80–90% to account for battery aging and temperature effects.
- For Li-Ion/LiPo, only 80–90% of rated capacity is usable before voltage drop becomes critical.