Battery Life Calculator
Calculate estimated battery runtime based on battery capacity and device current consumption.
Battery Parameters
Enter battery capacity and device consumption
Typical values: 80-95% for Li-ion, 60-80% for NiMH
Results
Estimated battery runtime
Enter battery parameters and click "Calculate Battery Life" to see results
Battery Types Reference
Common Battery Types
Li-ion (3.7V)80-95% efficiency
NiMH (1.2V)60-80% efficiency
Lead Acid (12V)70-85% efficiency
Alkaline (1.5V)40-60% efficiency
Typical Consumption
Smartphone (idle)50-100 mA
Smartphone (active)200-500 mA
LED Flashlight100-300 mA
Arduino Uno50-200 mA