Battery Life & Runtime Calculator (mAh / Ah & Load Watts)
Electronics, robotics, and portable devices tool. Models Lithium LiPo/LiFePO4 or Lead-acid discharge applying Peukert efficiency rule (80%).
Input Parameters
Instant Calculation Result
Adjust values on the left to calculate live results.
In-Depth Guide & Mathematical Methodology
🔋 Battery Discharge & Chemistry Rules
Lithium (LiPo / Li-ion): Nominal ~3.7V per cell, high efficiency (~85-90%).
Lead-Acid (AGM / GEL): Nominal 12V, limit DoD to 50% for maximum cycle life.
Frequently Asked Questions (FAQ)
What is the Battery Life & Runtime Calculator (mAh / Ah & Load Watts) and how does it work?
Electronics, robotics, and portable devices tool. Models Lithium LiPo/LiFePO4 or Lead-acid discharge applying Peukert efficiency rule (80%).
How do I use this Battery Life & Runtime Calculator (mAh / Ah & Load Watts)?
Enter Battery Capacity (in milliamp-hours mAh or Amp-hours Ah). Enter Battery Nominal Voltage (Volts - V, e.g. 3.7V LiPo, 12V Lead). Enter Load Power Consumption (in Watts - W or milliamps - mA). View Estimated Runtime in Hours and Days.
What mathematical formula is used in this calculation?
Battery Energy (Wh) = (CapacitymAh / 1000) * VoltageV. Theoretical Hours = EnergyWh / LoadWatts. Real Hours (80% eff) = TheoreticalHours * 0.80.
Is the Battery Life & Runtime Calculator (mAh / Ah & Load Watts) on FindCalculator free to use?
Yes, all 330+ interactive tools on FindCalculator.online are 100% free, run directly in your browser without registration, and do not store your private calculation data.