1. Graphical section: CH % indicated numerically and by the analog fan; Low charge, Pass, Fail, Warning icons.
2. Main data section: Measured lowest voltage during cranking.
3. Reference and prompts section: Prompt to advance to next screen; Rated value
The Cranking Health is the actual cranking performance of the battery shown as a percentage. A result of 100%
Cranking Health is the starting performance expected from a properly sized, fully charged, new battery. A result of 0%
Cranking Health implies imminent starting failure.
If Cranking Health is below 40% during normal temperatures (10° - 30°C), expect cranking failure if the temperature
becomes cold (< 0°C.) Consider replacing battery now, in advance of failure.
Cranking performance and CH results are dramatically affected by temperature. If battery temperature is very low,
below -15°C, poor cranking health (CH%) is expected even for a healthy battery. Replacing a battery may not help in
these conditions.
A drained battery can also affect cranking performance and CH results. If SoC is below 75%, recharge the battery and
test again.
Cranking performance and CH results will be lower the first time an engine is started after a long period of rest. A cold
engine and cold lubrication will result in a high starting load. A warm engine will be easier to start and CH values will
be higher. Use the lower value to inform your replace battery decision.
– Fail, Replace Now
When CH = 0%, the replace battery indicator illuminates and the analyzer beeps three times. Crank failure is imminent
and immediate battery replacement is advised.
~ (alternating) - Warning, Replace Soon
When CH is between 1% and 50%, the Warning indication, alternating pass / fail icons, illuminate, indicating weak
cranking health. The battery can effectively crank the engine, but performance is weak. Consider replacement soon.
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