Battery Discharge Curve Calculator

Model battery discharge curves under different C-rates. Estimate voltage sag and runtime.

Nominal Voltage (V)

Capacity (Ah)

Internal Resistance (mΩ)

Discharge C-Rate

Cutoff Voltage (V)

Temperature (°C)

V_loaded = V_nom – I × R_int

Runtime t = C / I (simplified, no Peukert)