LiPo Battery Health Analyzer

Quickly calculate Voltage Sag, Internal Resistance, and Power Loss to evaluate your drone battery performance.

Input Metrics

Resting Voltage (V)

Under-load Voltage (V)

Current Load (Amps)

Live Analysis

Voltage Sag

0.00 V

Internal Resistance

0.00 mΩ

Power Loss (Heat)

0.00 Watts

Health Status:

Awaiting Data

Battery Safety & Insights

The Math

Internal Resistance (IR) is calculated as: (Resting Voltage - Load Voltage) / Current. Higher IR means your battery converts more energy into heat rather than thrust, leading to reduced flight times and potential safety risks.

Warning Signs

If your battery feels excessively hot after a flight or shows "puffy" cells, IR is likely high. Replace cells that consistently exceed 20mΩ, as they become fire hazards under high discharge loads.

Best Practices

Always store your LiPos at "storage voltage" (3.80V–3.85V per cell) when not in use. This preserves chemical stability and prevents the electrolyte breakdown that increases internal resistance over time.