Battery Capacity Calculator — Free Online Tool
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Battery Capacity Calculator

Estimate battery runtime based on capacity and current draw

Formula: $\text{Runtime (Hours)} = \frac{\text{Battery Capacity (mAh)}}{\text{Current Draw (mA)}} \times \text{Efficiency Factor}$. (Standard efficiency assumed at ~80% for real-world losses).
Battery Parameters

Calculation Results

⚠️ For educational purposes only. Actual battery life may vary due to temperature, battery age, discharge rates, and circuit efficiency.

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