1. What is Battery Run Time?

Battery run time is the duration a battery can power a device before needing recharge. It's calculated by dividing the battery's capacity (in watt-hours) by the device's power consumption (in watts).

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• Capacity — Battery energy storage capacity in watt-hours (Wh)
• Power — Device power consumption in watts (W)

Explanation: This equation gives the theoretical maximum run time. Actual run time may vary due to factors like battery age, temperature, and efficiency losses.

3. Importance of Run Time Calculation

Details: Calculating battery run time helps in selecting appropriate batteries for devices, planning power needs, and estimating operational duration for battery-powered equipment.

4. Using the Calculator

Tips: Enter battery capacity in watt-hours and device power consumption in watts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert mAh to Wh?
A: Multiply mAh by voltage (V) then divide by 1000: Wh = (mAh × V) / 1000

Q2: Why is actual run time often less than calculated?
A: Factors like battery age, temperature, discharge rate, and circuit efficiency can reduce actual run time.

Q3: What's a typical battery capacity for smartphones?
A: Typically 10-20 Wh (e.g., 3000 mAh at 3.7V ≈ 11.1 Wh)

Q4: How accurate is this calculation?
A: It provides theoretical maximum. For precise estimates, consider battery specifications and real-world testing.

Q5: Does this work for all battery types?
A: Yes, the calculation applies to any battery type (Li-ion, NiMH, lead-acid, etc.) when using Wh capacity.