OK (Green LED light) Battery capacity is good. Battery may or may not be
fully charged.
OK + Weak Battery charge or capacity is low. Battery may be
(Green + Yellow LED light) discharged or nearing the end of its useful life.
Charge the battery and re-test.
Weak (Yellow LED light) Battery capacity is low. Battery may be defective or
discharged. Charge the battery and re-test. If the
battery will not load test to a satisfactory level after
charging, the battery is defective.
Bad (Red LED) Battery is likely defective. Charge and re-test to
confirm as warranted.
Digital LED displays “c.b” If the Open Circuit Voltage of the battery when initially
connected is lower than 12.3 volts or higher than 13.2
volts, the tester will display “c.b” (charge battery).
Battery will need to be fully charged before testing.
After charging, please wait at least 30 minutes to let
the voltage stabilize prior to load testing. If the
battery voltage is still below 12.3 volts after charging,
the battery should be replaced. If the battery voltage
is above 13.2 volts and you are testing a battery
installed in a vehicle, turn off the engine and turn on
the headlights for a few seconds for the voltage to
drop below 13.2 volts before load testing the battery.
7. Refer to the following chart as a reference point for assessment of testing
results. If the tester indicates poor battery condition, allow the battery to
stabilize for a few minutes and check the Open Circuit Voltage. This is a good
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