400A 3.0M booster cable

Suitable for petrol engines up to 3,500cc and 4 cylinder diesel engines up to 3,000cc

3.0m, 400Amp insulated twin cable

Fully insulated battery clamps

Built in surge guard, protects vehicle electronics and engine management systems.

Connect the Cables

Begin by parking the vehicle with the good battery next to the car with the dead battery.

Open the hoods of both cars and locate their batteries. If the batteries are covered by plastic hoods, remove the hoods so the battery posts are exposed.

Locate the positive (+) and negative (-) posts. The positive post may be red, but it's not always, so it's best to look for the plus or minus sign to determine the post's polarity. (Before you attach the clamps, be sure to remove any dirt from the posts.)

Next, get out your jumper cables and connect one of the red clamps to the positive (+) post of the dead battery. Make sure that the clamp is firmly connected. Clamp the matching end of the same cable to the positive (+) post on the working battery.

Connect one of the black clamps to the negative (-) post of the good battery. Make sure the clamp is firmly connected. But instead of connecting the other end of the cable to the negative post of the dead battery, clamp it to a bare, metal surface on the engine of the dead car — like a bolt or a screw. This will provide grounding for the jump start.

Start the Engines

Start the functioning car's engine first and let it idle for a few minutes.

Start the dead car's engine and let it idle for a few minutes.

If the dead car starts without any issues, carefully disconnect the black clamp from its battery first. Then disconnect the black clamp from the other car.

Finally, remove the red clamp from the good car's battery and then from the once-dead battery.

It's best to keep your car running for a good while to help recharge the battery, but you should also consider having its voltage checked to be sure it doesn't need replacing.