1. What is Lithium Battery Run Time?

The run time of a lithium battery refers to how long the battery can power a device before needing to be recharged. It depends on the battery's capacity, voltage, and the power consumption of the load.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

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

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

3. Importance of Run Time Calculation

Details: Calculating run time helps in selecting the right battery size for applications, estimating backup power duration, and designing power systems for electronic devices.

4. Using the Calculator

Tips: Enter the battery capacity in amp-hours (Ah), battery voltage in volts (V), and load power in watts (W). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity. Wh = Ah × V.

Q2: Does this work for all battery types?
A: The formula works for any battery type, but lithium batteries typically have different voltage ranges (e.g., 3.7V per cell).

Q3: How accurate is this calculation?
A: It provides theoretical maximum. Actual run time may be less due to temperature, discharge rate, and battery age.

Q4: Should I include inverter efficiency?
A: For AC loads, multiply the load power by 1.1-1.2 to account for inverter losses (typically 80-90% efficient).

Q5: What about battery depth of discharge?
A: For longer battery life, multiply result by 0.8 (for 80% depth of discharge) as most batteries shouldn't be fully drained.