Will the GB20 start my car?

It is rated for 12V gasoline engines up to 4 liters, so it suits most cars, SUVs and motorcycles. It is not intended for diesel engines or larger gasoline engines.

How many jumps per charge?

NOCO rates it at up to 20 jumps on a full charge, depending on engine size and temperature. It holds its charge for up to a year in storage.

Does it come with a case?

No. The GB20 ships with the jump starter and clamps but no carry case, so many owners buy one separately.

Can I use it as a power bank?

Yes. It has a USB output to charge phones and tablets, though charging is slower than a wall charger.

Is it safe if I connect the clamps backwards?

Yes. UltraSafe circuitry prevents sparks and protects against reverse polarity, so a mistaken connection will not damage the unit or the battery.

It has sold around $80 to $100 at most stores. The $63.96 at Blain's Farm & Fleet as of November 8, 2026 is well below that, so it is a good time to buy.

NOCO Boost GB20: 500A 12V UltraSafe Portable Lithium Jump Starter

Q: Where is the NOCO Boost GB20: 500A 12V UltraSafe Portable Lithium Jump Starter cheapest?

At Blain's Farm & Fleet, for $63.96, 29% under what the other stores charge, as of our latest check.

Q: What do buyers say about the NOCO Boost GB20: 500A 12V UltraSafe Portable Lithium Jump Starter?

Rated 4.5 out of 5 from 176 ratings.

Q: Where can I buy the NOCO Boost GB20: 500A 12V UltraSafe Portable Lithium Jump Starter?

6 stores we checked sell it, including Blain's Farm & Fleet, TWIST, The Twister Group, Walmart, Ace Hardware.

Best price now

$63.96at Blain's Farm & FleetVerified

29% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

Visit Blain's Farm & Fleet

What reviewers say

4.5 / 5176 ratings

Owners rate the GB20 highly, calling it a reliable, easy-to-use booster that starts small gasoline engines on the first try. Most praise the compact size, the safe clamp design and the built-in light. Complaints center on the lack of a carry case and on its limits for larger or diesel engines.

What people mention

Starting powerPraisedOwners say it fires up gasoline cars and motorcycles without hesitation.
Safety clampsPraisedReviewers like that reversed clamps do no damage and sparks are avoided.
PortabilityPraisedIts small size lets people keep it in the glovebox or under a seat.
Engine limitsCriticisedBuyers report it struggles with diesel engines and larger gasoline engines.
Carry caseCriticisedSeveral owners complain no case is included to hold the clamps and cable.
Battery drainMixedSome say it holds charge for months; a few found it needed recharging sooner than expected.

About the NOCO Boost GB20: 500A 12V UltraSafe Portable Lithium Jump Starter

The NOCO Boost Sport GB20 is a compact, lightweight, and powerful portable car battery jump starter designed for 12-volt batteries. Rated at 500 amps, it delivers serious performance to safely jump start dead batteries in seconds—up to 20 times on a single charge. Whether you’re driving a car, truck, SUV, motorcycle, ATV, or boat, this car battery jump starter is engineered to handle engines up to 4 liters of gasoline. This portable jump starter for cars is built with NOCO’s signature UltraSafe technology, featuring spark-proof connections and reverse polarity protection for worry-free operation. It’s a reliable battery booster jump starter for roadside emergencies, cold starts, and everyday use. The GB20 doubles as a jump starter power pack, featuring a high-output 100-lumen LED flashlight with seven light modes, including SOS and emergency strobe. It also functions as a portable power bank to recharge smartphones, tablets, and other USB devices on the go—ideal for travel, camping, or unexpected situations. Unlike bulky car starter jump boxes, the GB20 is ultra-portable and holds its charge for up to a year. It’s the perfect combination of a car jump starter, motorcycle battery jump starter, and auto battery booster pack—all in one compact design. Whether you call it a battery jump starter, booster pack jump starter, or self jump starter for car, the GB20 is trusted by mechanics, drivers, and adventurers everywhere. From everyday drivers to professionals, the NOCO Boost Plus GB20 is the ultimate auto jump starter power pack for anyone looking for safety, reliability, and performance in a portable car jump starter.