Best Jump Starters: 5 Picks Ranked

Jump Starters FAQ

1. How do I choose between lithium and lead-acid jump starters?add

   Lithium jump starters weigh less and hold their charge for months without maintenance, making them practical for occasional use and tight storage spaces. Lead-acid units deliver consistent high current and work reliably in workshops where the extra weight is not a concern. Choose lithium for portability and infrequent use, and lead-acid for professional environments with daily jump starts.
2. Is it worth spending more for higher peak amps?add

   Higher peak amps matter when you have a large engine, especially diesel, or when you need to jump-start vehicles in cold weather. Match the amperage to your largest vehicle to avoid buying more capacity than you'll use.
3. What safety features prevent damage during a jump start?add

   Spark-proof technology prevents arcing when you connect the clamps, and reverse polarity protection stops current flow if you attach the cables incorrectly. These features protect both the jump starter and your vehicle's electrical system. Look for units that include both protections if you're uncomfortable with battery connections.
4. Can a portable jump starter actually start a diesel engine?add

   Portable lithium jump starters can start diesel engines when the unit provides enough peak amps and the engine size matches the specifications. Diesel engines require more cranking power than gas engines of the same size, so check the diesel capacity rating rather than assuming gas ratings apply. Larger diesel engines may need units in the 4000-amp range.
5. How often should I recharge a jump starter?add

   Lithium jump starters hold their charge for several months and typically need recharging every three to six months when stored unused. Lead-acid models require more frequent charging, often monthly, to prevent sulfation and maintain capacity. Check the indicator lights periodically and recharge before the unit drops below half capacity for longest battery life.
6. Will a jump starter work with my motorcycle or boat?add

   Most 12-volt jump starters work with motorcycles, boats, ATVs, and other small vehicles as long as the peak amps meet the engine's needs. Motorcycles typically need less power than cars, so even compact models suffice. Check that the clamps can reach your battery terminals and that the unit specifies compatibility with your vehicle type.
7. What is the best jump starter for cold weather use?add

   Lithium jump starters that specify wide temperature ranges, often from -4°F to 140°F, perform better in cold weather than models without cold-weather ratings. Cold reduces battery capacity in any chemistry, so choose a unit with higher peak amps than you'd need in warm weather. Store the jump starter indoors when possible and keep it warm before use in extreme cold.