Power Duration Modeling
- Enter your Battery Capacity (in mAh or Ah).
- Input the average Device Load (current draw in mA or A).
- Adjust the Discharge Limit (80% is recommended for Lithium/LFP cells).
- View the Estimated Runtime in Days, Hours, and Minutes.
- Review the C-Rate Insight to evaluate the heat and stress on your battery pack.
Frequently Asked Questions
How do I calculate battery run time?
Run Time (Hours) = (Battery Capacity × Discharge Limit) / Average Load. For example, a 5000mAh battery powering a 500mA device at 80% discharge will last 10 hours.
What is mAh and Ah?
mAh stands for Milliampere-hours, and Ah stands for Ampere-hours. 1,000 mAh is exactly equal to 1 Ah. Small electronics use mAh, while car or solar batteries use Ah.
Why should I set a discharge limit?
Discharging a battery to 0% significantly reduces its lifespan (cycle life). Lithium batteries (Li-ion) should typically stay above 20%, while Lead-Acid batteries should stay above 50% for maximum health.
How does 'C-Rate' affect battery life?
C-Rate is the measure of the rate at which a battery is discharged relative to its maximum capacity. A 1C rate means the discharge current will empty the entire battery in 1 hour. Higher C-rates generate more heat and reduce efficient runtime.
Duration Dynamics
- Instant runtime estimation countdown
- Supports both mAh and Ah industrial units
- Adjustable discharge safety limit slider
- Critical C-Rate discharge rate insights
- 100% private — your power data stays local
- Mobile-optimized for field battery checks