1. What is Battery Runtime?

The battery runtime is the estimated time a battery can power a device before needing recharge. It depends on the battery's capacity, voltage, and the device's power consumption.

2. How Does the Calculator Work?

The calculator uses the battery runtime equation:

Where:

• \( \text{Battery Capacity} \) — The energy storage capacity in amp-hours (Ah)
• \( \text{Battery Voltage} \) — The nominal voltage of the battery (V)
• \( \text{Power} \) — The device's power consumption in watts (W)

Explanation: The equation converts the battery's energy capacity to watt-hours (by multiplying Ah × V) then divides by the device's power consumption to get runtime in hours.

3. Importance of Runtime Calculation

Details: Accurate runtime estimation helps in selecting appropriate batteries for devices, planning power needs, and ensuring uninterrupted operation of critical equipment.

4. Using the Calculator

Tips: Enter battery capacity in Ah, voltage in V, and power consumption in W. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: It provides theoretical maximum runtime. Actual runtime may be 10-25% less due to efficiency losses, temperature, and battery age.

Q2: Can I use this for lithium-ion batteries?
A: Yes, the calculation works for all battery types as long as you know the correct capacity and voltage.

Q3: What if my device lists current (amps) instead of power (watts)?
A: Multiply current (A) by voltage (V) to get power (W). For example, 2A at 12V = 24W.

Q4: Does this account for battery discharge rates?
A: No, very high power draws may reduce effective capacity. Check battery specifications for C-rating.

Q5: How can I increase runtime?
A: Use a higher capacity battery, multiple batteries in parallel, or reduce power consumption of your device.