battery_charging_full
Cold Cranking Amps
Ready
dark_mode
Battery Inputs
tune
directions_car
Engine preset
Custom
4-cyl compact (1.5–2.0 L)
6-cyl midsize (3.0–3.5 L)
V8 truck / performance (5.0 L+)
tag
Rated CCA (factory)
bolt
Measured CCA (tester)
ac_unit
Temperature zone
Warm (25 °C / 77 °F)
CCA standard (−18 °C / 0 °F)
Extreme cold (−30 °C / −22 °F)
calculate
Calculate
restart_alt
Reset
State of Health
analytics
verified
Battery OK
Capable of cold cranking
—
%
SoH
—
mΩ
Est. impedance
—
Rated CCA
—
Measured
—
Min needed
SoH % = Measured CCA ÷ Rated CCA
R
int
≈ 21 600 ÷ CCA (mΩ estimate)
Voltage Load Curve
animation
Simulated cranking voltage sag by SoH
Quick Guide
info
bolt
SoH ≥ 75%
— healthy for cold starts.
warning
50–75%
— recharge & retest; sulphation may be starting.
dangerous
Under 50%
— replace before the next cold morning.