Analyze Betaflight Blackbox logs for voltage sag
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Creates visual animation (slower processing)
This tool analyzes your Betaflight Blackbox log to visualize battery internal resistance and voltage sag. Internal resistance causes voltage to drop under load - higher current means greater sag.
What you'll see:
Blue Line (IR): Shows calculated internal battery resistance during flight.
Title: Minimum RI recorded in flight. Displayed in mΩ - lower is better.
Output Options:
Animated GIF: Shows how voltage-current relationship changes throughout the flight, useful for understanding battery behavior under varying throttle conditions.
Static PNG: Shows overall internal resistance trend across the flight, displaying the minimum IR value achieved.
Why it matters: High internal resistance means significant voltage drop during punchouts, reducing available thrust and causing motors to brownout. Batteries with lower IR (like premium LiPo packs) maintain voltage better under load, delivering more consistent power.
Tip: Compare different batteries with the same flight log to see which has the lowest IR and best voltage retention under the same throttle conditions.
Uses a betaflight blackbox file to nalyze battery voltage sag under load during your flight.