This calculator estimates how long a battery will last based on its rated capacity, your device's current draw, and usage pattern. It also lets you adjust for real-world conditions.

• Duty Cycle (%): Use this to represent how often the device is active. For example, a 50% cycle might mean equal time transmitting and receiving.
• Efficiency (%): Most rechargeable batteries don’t deliver their full rated capacity. You can adjust this for battery aging or temperature effects.

The basic formula (with modifiers) is: \[ \text{Battery Life} = \frac{\text{Capacity} \times \text{Efficiency}}{\text{Draw} \times \text{Duty Cycle}} \]

This tool is ideal for planning field operations, remote monitoring systems, or portable rigs powered by batteries or solar storage.