Expected runtime
Hours
27.8
Days
1.2
Months
0.04
Battery life
Model realistic runtime with duty cycle and derating baked in.
Uses the standard runtime estimation approach by combining nominal capacity, active load, percent-on time, and chemistry derating to deliver hours, days, and months of life.
2,500 mAh
Capacity
72.0 mA
Avg load
27.8 h
Runtime
Chemistry presets
Use derating to capture temperature, aging, and datasheet optimism.
Inputs
mAh
mA
%
%
Effective capacity
2000 mAh usable after derating.
Includes temperature, age, and discharge rate safety margin.
Duty cycle load
Average draw 72.0 mA across the full period.
Lower on-time pushes runtime up, but mind wake energy.
Design notes
- Stack multiple loads (sleep + active) by converting to an equivalent single duty-cycle scenario.
- Remember cold-weather capacity loss can exceed 30%—increase derating for field deployments.
- Check datasheet discharge curves; high peak loads can trigger protection before capacity is exhausted.
Need more precision? Average a full current profile and feed its mAh per day into the calculator.