About Battery Life Calculator
Calculate battery run time and operating lifespan from capacity and current draw.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Battery Life (Hours) = (Capacity mAh / Device Load mA) × 0.70 (Derating factor)
Example Calculation
A 2,500 mAh battery powering a 50 mA sensor runs for approximately 35 hours.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.