1. What is Battery Runtime Calculation?

Battery runtime calculation estimates how long a battery will last based on its energy capacity (watt-hours) and the power consumption of the device it's powering. This helps in planning power requirements for various applications.

2. How Does the Calculator Work?

The calculator uses the battery runtime formula:

Where:

• \( Wh \) — Battery capacity in watt-hours
• \( W \) — Power consumption in watts

Explanation: This simple division gives the estimated runtime in hours, showing how long the battery can power a device at the specified wattage.

3. Importance of Battery Runtime Calculation

Details: Accurate battery runtime estimation is crucial for planning portable device usage, emergency power systems, and ensuring uninterrupted operation of critical equipment.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is a watt-hour (Wh)?
A: A watt-hour is a unit of energy equal to one watt of power expended for one hour of time.

Q2: How accurate is this calculation?
A: This provides a theoretical maximum. Actual runtime may vary due to battery age, temperature, discharge rate, and efficiency losses.

Q3: Can I use this for different battery types?
A: Yes, the formula works for any battery type (Li-ion, lead-acid, NiMH) as long as you know the capacity in watt-hours.

Q4: What if my device has variable power consumption?
A: Use the average power consumption for estimation, or calculate runtime for different power levels separately.

Q5: How do I convert amp-hours to watt-hours?
A: Multiply amp-hours by battery voltage: Wh = Ah × V. You need to know the battery voltage for this conversion.