Traditional jumper cables require a donor car and space to park it. A booster pack makes jump-starting a vehicle a one-person job. Modern lithium-ion booster packs are small enough to fit in a glovebox but can deliver over 1000 peak amps to start large V8 engines. They feature built-in safety sensors to prevent sparks if you hook up the clamps backward. Keep the pack fully charged in your trunk, especially during winter months when cold temperatures reduce battery power.
Mechanic Glossary
Booster Pack
A portable, rechargeable lithium or lead-acid battery pack equipped with jumper clamps to jump-start vehicles with dead batteries.
Frequently Asked Questions
Most quality lithium packs can start 10 to 20 vehicles before needing a recharge, depending on engine size.
Yes, but some smart packs require you to press a override button to output power if the vehicle battery voltage is below 2 volts.
A typical lithium booster pack will last 3 to 5 years if kept charged and not stored in extreme heat.
Peak amps is the maximum short burst of current, while cranking amps is the continuous power output used to spin the starter motor.