Product Manual

Charging the GB40.

Connect the GB40 using the included USB Charge

Cable to the USB IN port and the USB car charger. It

can also be recharged from any USB powered port,

like an AC adapter, car charger, laptop and more. The

USB IN port is rated at 2.1 Amps to ensure safe and

efﬁcient charging of the internal lithium battery. Due to

FCC regulations, we recommend not to charge and

discharge the unit at the same time.

Charging Times.

The time to recharge a GB40 will differ based on the

discharge level and the power source used. Actual

results may vary due to battery conditions.

Charging Your USB Devices.

You can recharge virtually any USB device, like a

smartphone. Connect the included USB Charge Cable

to the USB OUT port and connect to your USB device.

Error Reason/Solution

Error LED

Blinking Red

w/Cables Connected

Properly

The internal battery is too

hot/

Allow the unit to cool.

Bring the unit into cooler

environment.

Time

USB Charger Rating

12hr

.5A

6hr

3hr

Boost Light Does

Not Come On

w/Cables Connected

Properly

Connected battery is below

2-volts/

Remove all loads, and

try again, or use Manual

Override Mode.