Topdon TB8000 Mode D'emploi page 10

Battery Test Mode
The TB8000 offers 1 battery test mode for testing the
voltage of vehicle battery. We recommend that you test the
vehicle battery first to confirm that it is in good conditions
before charging.
Voltage Value
>13.1V
12.1 - 13.0V
11.6 - 12.0V
<11.5V
Charging Your Vehicle Battery
Important:
Please do not operate the charger until you confirm the
appropriate charging mode for your battery. You can verify
the voltage and chemistry of the battery by consulting
the manufacturer's manual, or by reading the label on the
battery.
1. Connect the clamps to vehicle battery terminals. Red
clamp to the positive polarity (+), black clamp to the
negative polarity (-).
Explanation (12V lead-acid batteries)
Normal volatge; sufficient power
Normal volatge; medium power
Low voltage; low power
Voltage too low ； possibly damaged
(Red) (Black)