Battery Runtime Calculator
Calculate how long any battery will run your devices before needing a recharge.
Input Your Specifications
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Results
Enter your battery and device specifications to see results
How Runtime is Calculated
Runtime = (Battery Capacity × 0.85) / Device Wattage
We use 85% Depth of Discharge (DoD) to protect battery lifespan and give you realistic estimates.
Actual runtime varies based on temperature, battery age, and device efficiency.