Jump starting
Connect cables in numerical order and disconnect in reverse order.

Jump starting can be dangerous if done incorrectly. Therefore, to avoid harm to yourself or damage to your vehicle or battery, follow these jump starting procedures. If in doubt, we strongly recommend that you have a competent technician or towing service jump start your vehicle.
Battery
Never attempt to check the electrolyte level of the battery as this may cause the battery to rupture or explode.
Frozen batteries
Do not attempt to jump start the vehicle if the discharged battery is frozen, as the battery may rupture or explode.
Battery
Keep all flames or sparks away from the battery. The battery produces hydrogen gas which will explode if exposed to flame or sparks.
Battery cables
Do not connect the jumper cable from the negative terminal of the booster battery to the negative terminal of the discharged battery, directly. This can cause the discharged battery to overheat crack, and degrade.
Make sure to connect one end of the jumper cable to the negative terminal of the booster battery, and the other end to a metallic point, far away from the battery.
Sulfuric acid risk
Automobile batteries contain sulfuric acid. When jump starting your vehicle, be careful not to get sulfuric acid on yourself, your clothing, or on the vehicle. This acid is poisonous and highly corrosive.