NOCO Genius GB40 Guide De L'utilisateur page 4

Low Voltage Batteries & Manual Override
The GB40 is designed to jump start 12-volt lead-acid
batteries down to 2-volts. If your battery is below 2-volts,
the Boost LED will be "Off". This is an indication that the
GB40 can not detect a battery.
If you need to jump start a battery below 2-volts there is a
Manual Override feature, which allows you to force "On" the
jump start function.
CAUTION. USE THIS MODE WITH EXTREME CARE. THIS
MODE IS FOR 12-VOLT LEAD-ACID BATTERIES ONLY.
BOTH THE SPARK PROOF AND REVERSE POLARITY
PROTECTION FEATURES ARE DISABLED. PAY VERY
CLOSE ATTENTION TO THE POLARITY OF THE BATTERY
BEFORE USING THIS MODE. DO NOT ALLOW THE
POSITIVE AND NEGATIVE BATTERY CLAMPS TO TOUCH
OR CONNECT TO EACH OTHER AS THE PRODUCT
WILL GENERATE SPARKS. THIS MODE USES VERY
HIGH CURRENT (UP TO 1000 AMPS) THAT CAN CAUSE
SPARKS AND HIGH HEAT IF NOT USED PROPERLY. IF
YOU ARE UNSURE ABOUT USING THIS MODE, DO NOT
ATTEMPT AND SEEK PROFESSIONAL HELP.
Before using the Manual Override feature, make sure the
HD battery clamps are connected to the correct polarity
battery terminals and the HD X Connect is connected to
the GB40. To use the Manual Override feature, press and
hold the Manual Override Button (a red exclamation point
icon inside a red circle) for three (3) seconds. The White
Boost LED will flash "On" and "Off" indicating you have
successfully entered into Manual Override and it is ready to
jump start your vehicle. If connected in reverse polarity, the
Red Error LED will illuminate and the unit will not operate.
CAUTION: POWER THE GB40 "OFF" BEFORE
DISCONNECTING THE BATTERY CLAMPS. THIS WILL
ENSURE YOUR SAFETY. REMEMBER BOTH THE
SPARK PROOF AND REVERSE POLARITY PROTECTION
FEATURES ARE DISABLED.
Most vehicles will immediately start. Some vehicles may
require the GB40 to be connected for up to 30 seconds