1.) 12V/24V Dial
The 12V/24V Dial allows for switching between different jump starting voltage options. This selects the 12V or 24V mode. Double check with the battery manufacturer before selecting this mode.
2.) Power LED
The Power LED indicates that the charger is on and ready for use.
3.) Boost LED
Illuminates White when Boost is active. If the unit is connected properly to a battery, the GB500 will automatically detect a battery and go into Boost mode (White LED ﬂashes when Manual Overide feature is active).
The built-in voltmeter reads the voltage of the vehicle’s battery for enhanced diagnostics and troubleshooting. The voltmeter will automatically read the voltage of any battery (or battery system) when the battery clamps are connected - even if the unit is powered off. The voltmeter will read voltage between ~3V to ~30V. If the connected battery is below 3V, nothing will display. In this situation, it is likely there is a load(s) on the battery, such as, headlights or an AC fan that should be shut off before attempting to start the vehicle.
5.) Manual Override Button
To enable, push and hold for three (3) seconds. WARNING: Disables safety protection and manually forces Boost “On”. Only for use when a battery is too low to be detected.
6.) Error LED
All error conditions are displayed with the Error LED and Standby LED flashing back and forth. The number of flashes between each pulse denotes a potential Error Condition (except reverse polarity and low-voltage battery).
7.) Cold LED
Illuminates solid Blue; unit is fully operational, but approaching lower temperature limit. Flashing Blue; unit is too cold to jump start, but other functions are still available.
8.) Hot LED
Illuminates solid Red; unit is fully operational, but approaching upper temperature limit. Flashing Red; unit is too hot to jump start, but other functions are still available.
9.) Charge LED
The Charge LED indicates the connected battery’s state-of-charge. It will "breathe" red while charging, and turn solid green when the battery is fully charged.
10.) Light Mode Button
The Light Mode LED illuminates White when the work light is turned “On”, but the unit is off.
11.) 12V OUT LED / 12V IN LED
Illuminates White; 12V Out function and 12V In function can only be used in 12V mode. Red glow indicates disabled 12V Input & Output.
12.) 12V 5A IN: Fast Charge
AC Charging: Connect the GB500 using the included 12V Adapter or 56W XGC Power Adapter to the 12V IN port. The GB500 must be in 12V mode to be charged. Recharge time will vary based on level of discharge. 12V DC Charging: The GB500 must be in 12V mode to be charged. Ensure the voltage selection knob is in the 12V position prior to charging. Connect the 12V Cable to the 12V IN port on the GB500, and the other end to the Male 12V Plug. Plug into a powered 12V AUX Plug (Cigarette Lighter Port).
13.) 12V 5A OUT: 12V Supply
The GB500 must be in 12V mode to enable 12V OUT. Connect the 12V Cable to the 12V OUT port on the GB500, and the other end to the Female 12V Plug (12V AUX / Cigarette Lighter Port). Plug-in any standard 12V device (up to 15A) with a 12V plug and turn the GB500 “On” to start powering your device.
14.) 2.1 A USB OUT (x2)
The USB OUT LED will illuminate White. The USB Out function can be used in both 12V and 24V modes.
15.) Boost MAX Connector Port
16.) Boost MAX Connector
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Monday May 30
The NOCO Company 30339 Diamond Parkway #102 Glenwillow, OH 44139-5400 United States of America