Battery Capacity Calculator
Battery Analysis
Watt-Hour Capacity: 0 Wh
Estimated Runtime: 0 hours
Effective Capacity: 0 mAh
Energy Density: –
Understanding Battery Capacity
Our Battery Capacity Calculator helps users convert between mAh and watt-hours while estimating device runtime. According to U.S. Department of Energy standards, proper capacity calculation can improve energy storage efficiency by up to 25%.
Usage Guide
- Input battery voltage (3.7V for most lithium-ion)
- Enter mAh rating from battery label
- Specify device current draw
- Select battery chemistry type
- Review capacity analysis
Battery FAQs
What’s the 80% rule?
Most batteries maintain optimal lifespan when only discharged to 80% capacity (Battery University).
How temperature affects capacity?
Capacity decreases 20-50% at freezing temps according to DOE research.
mAh vs Wh difference?
mAh measures charge capacity, Wh measures energy capacity (voltage × mAh).
Cycle life estimation?
Quality 18650 cells typically offer 300-500 cycles before 80% capacity.
For more electrical tools, explore more calculators on our platform.
Why Capacity Matters
Proper battery sizing ensures:
- Device reliability
- Optimal charge cycles
- Safety during operation
- Cost-effective power solutions
Munna Bhai
Digital Marketer/ Web App Developer & FB/Instagram Ads Expert