1. What is the Battery Time Calculator?

The Battery Time Calculator estimates how long a battery will last under a specific load. It calculates runtime based on the battery's capacity (in amp-hours), voltage, and the power consumption of the connected device.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• Battery Capacity — The energy storage capacity in amp-hours (Ah)
• Battery Voltage — The nominal voltage of the battery (V)
• Load Power — The power consumption of the connected device (W)

Explanation: The equation converts the battery's energy capacity (in watt-hours) and divides it by the load's power consumption to determine runtime.

3. Importance of Battery Time Calculation

Details: Accurate battery runtime estimation is crucial for system design, backup power planning, and determining appropriate battery sizes for applications.

4. Using the Calculator

Tips: Enter battery capacity in Ah, battery voltage in volts, and load power in watts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all battery types?
A: This provides an estimate. Actual runtime may vary based on battery chemistry, temperature, age, and discharge rate.

Q2: How do I find my battery's capacity?
A: Check the battery specifications or label. Capacity is typically listed in amp-hours (Ah) or milliamp-hours (mAh).

Q3: What if my device lists current (A) instead of power (W)?
A: Multiply current (A) by voltage (V) to get power (W). Many devices list both.

Q4: Does this account for battery efficiency?
A: No, for lead-acid batteries you might multiply result by 0.8-0.9 to account for efficiency losses.

Q5: Can I use this for battery banks?
A: Yes, if batteries are connected in parallel, sum their capacities. If in series, sum voltages but capacity stays the same.