Why is real life shorter?
Batteries lose efficiency at higher discharge rates, extreme temperatures, and as they age. Voltage drop also affects usable capacity.
Calculator
Enter your values
Analysis
Interpretation of the current calculator output
Enter values to see detailed analysis and insights.
How to Use
Step-by-step instructions
- 1Enter the battery capacity (mAh).
- 2Enter the device current consumption (mA).
- 3The calculator will estimate the runtime.
Runtime Estimation
Divides the battery capacity (mAh) by the device consumption (mA) and applies an efficiency factor (typically 0.85) to account for losses.
Time = (Capacity / Load) × EfficiencyVariables:
CapacityBattery capacity in mAhLoadCurrent draw in mAEfficiency0.85 (Typical)Example
IoT Device
Inputs:
Capacity:2500 mAh
Load:500 mA
Steps:
- 1.Ideal = 2500 / 500 = 5 hours
- 2.Estimated = 5 * 0.85 = 4.25 hours
Result:
4.3 Hours