NOCO Boost GB40 Full Tutorial — Jump Start Any Dead Car Battery, by Fer's Reviews on YouTube. 7 min 45 s.
- Video length
- 7 min 45 s
- Time to do it
- 10 minutes
- Difficulty
- Easy
- Steps
- 9
What you need
Steps
Charge the GB40 fully before you store it in the car. Plug the included micro-USB cable into the charging port and leave it until all four charge lights stay solid.
Check the battery. The GB40 suits 12-volt batteries in cars, boats, motorcycles and lawn mowers, with gas engines up to 6 liters and diesel up to 3 liters.
Switch the jump starter off, then push the red clamp onto the positive battery terminal and wiggle it so the teeth bite bare metal.
Clip the black clamp to the negative terminal, or to a bare metal ground point on the engine block away from the battery.
Watch the lights on the clamps. A green light means the connection is correct. A red or flashing light means the clamps are reversed, so swap them.
Start the engine as normal. Once it runs, remove the black clamp first, then the red, and put the cables back in the case.
If the battery is completely flat and the ready light never comes on, press and hold the manual override button until the white light shows, then start the engine within about 30 seconds.
Recharge the GB40 after every jump and top it up every few months so it is ready when you need it.
Use the built-in flashlight and USB port to charge a phone in an emergency, and store the unit out of direct sun and away from heat.
Tips and common mistakes
Keep hands, tools and loose clothing clear of belts, fans and pulleys, and wear safety glasses when working around a battery.
Do not let the red and black clamps touch each other while the unit is on, even though the GB40 has short-circuit protection.
The GB40 will not start big trucks, large diesels or RVs. Step up to a heavier model such as the GBX155 for those.
A jump start gets you moving but does not fix a weak battery. Drive for 20 to 30 minutes or put the battery on a charger.
Questions
Can the NOCO GB40 start a completely dead battery?
Yes, if the battery is 12 volts and the engine is within its rated size. When the ready light stays off, use the manual override button and start the engine within about 30 seconds.
How often should I recharge the GB40?
Recharge it after every jump and top it up every few months. A lithium jump starter slowly loses charge while it sits in the trunk.
What engine size can the GB40 handle?
NOCO rates it for gas engines up to 6 liters and diesel up to 3 liters. Bigger trucks, large diesels and RVs need a more powerful model.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
