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LED Explanation

25%

Red LED

25% 50% 75% 100%

The 25% Charge LED will ‘breath’ on/off while charging and will be solid Red when the internal battery is 25% charged.

50%

Red LED

25% 50% 75% 100%

The 50% Charge LED will ‘breath’ on/off while charging and will be solid Red when the internal battery is 50% charged.

75%

Yellow LED

25% 50% 75% 100%

The 75% Charge LED will ‘breath’ on/off while charging and will be solid Yellow when the internal battery is 75% charged.

100%

Green LED

25% 50% 75% 100%

The 100% Charge LED will ‘breath’ on/off while charging and will be solid Green when the internal battery is fully charged. When connected to a USB charger,

no other charge LEDs will be illuminated. Once disconnected from the charger, all four (4) Charge LEDs will be illuminated when the internal battery is between

75%-100%, and the unit is powered “ON”.

User Interface.

1. Internal Battery Level

Indicates the charge level of the internal battery.

2. Error LED

Illuminates Red if the reverse polarity is detected, or blinks “On” and “Off” when the internal battery temperature is too high.

3. Power Button

Push to turn unit “On” & “Off”.

4. Power LED

Illuminates white when the unit is “On”.

5. Boost LED

Illuminates White when Boost is active. If the unit is connected properly to a battery, the GB40 will automatically detect a battery and go into Boost mode (LED flashes White when the

Manual Override feature is active).

6. 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.