Wh to mAh Calculator

Understanding Watt-hours to Milliamp-hours Conversion

The conversion from Watt-hours (Wh) to Milliamp-hours (mAh) is a fundamental calculation in battery technology and electrical engineering. This calculation helps in estimating how long a battery can supply power under a specific load, thus aiding in the selection and design of battery-powered systems.

mAh from Wh Formula

The formula for converting Wh to mAh is given by:

\[ \text{mAh} = \frac{\text{Wh} \times 1000}{V} \]

where:

• \(\text{mAh}\) is the battery capacity in milliamp-hours,
• \(\text{Wh}\) is the energy in watt-hours,
• \(V\) is the voltage in volts.

Example Calculation

For instance, if you have a battery that stores 2 Wh of energy and operates at 5 volts, the capacity in mAh would be:

\[ \text{mAh} = \frac{2 \times 1000}{5} = 400 \text{ mAh} \]

Importance and Applications

Understanding the conversion between Wh and mAh is crucial in the fields of consumer electronics, electric vehicles, and renewable energy systems, where efficient energy storage and usage are paramount. This calculation aids in comparing batteries of different voltages and capacities on a uniform scale.

Common FAQs

1. Why convert Wh to mAh?

   • Converting Wh to mAh helps in understanding and comparing the actual capacity of batteries, regardless of their voltage.

2. Can this formula be used for any battery type?

   • Yes, this formula is universally applicable for all types of batteries, assuming the voltage is known.

3. Does the efficiency of the battery affect this calculation?

   • This calculation assumes ideal conditions. In real-world applications, the efficiency of the battery and the discharge rate can affect the usable capacity.

This calculator streamlines the conversion process, making it accessible for professionals, hobbyists, and students involved in electrical engineering and battery technology projects.