Battery Charge Time
Provide the battery's capacity, the charger's output and an efficiency estimate to gauge the approximate charging duration.
CalcSimpler Examples
- 3000 mAh with 1000 mA at 90% ⇒ 3.33 h
- 2000 mAh with 500 mA at 85% ⇒ 4.71 h
- 4500 mAh with 1500 mA at 92% ⇒ 3.26 h
FAQ
Why include efficiency?
Charging isn't perfectly efficient; some energy is lost as heat or resistance.
Can I use different units?
Yes. Ensure capacity and current use the same base units (e.g., Ah and A).
How do I handle partial charges?
Multiply the result by the fraction of the battery you need to fill.
Does this handle fast charging?
It offers a rough average; fast chargers often taper current as the battery fills.
Additional Information
- Time is calculated as capacity ÷ (current × efficiency).
- Efficiency accounts for energy lost as heat; most chargers fall between 85–95%.
CalcSimpler