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The NOCO Boost X GBX155 is a 4,250-amp lithium jump starter for 12V lead-acid batteries, rated for gasoline engines up to 10.0L and diesel up to 8.0L. It uses NOCO's UltraSafe 2.0 protection with spark-proof clamps and reverse polarity protection, and it can go from empty to jump-starting in about 5 minutes of charge. It also works as a USB-C Power Delivery power bank and is IP65 rated. Its best new price is $290.00 at eBay as of November 5, 2026, with 7 stores listing it new.
In stockSold by NOCOReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Availability unknownSold by aviel907 (99.9% positive, 1,600 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
Availability unknownSold by whizkid355 (100% positive, 3,000 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
Availability unknown
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Lowest price we've seen: $369.95 on Nov 6 at Walmart. Tracked across 6 stores since Nov 6.
Rated 4.4 out of 5 from 95 ratings, the GBX155 draws praise for starting large engines and for its fast recharge. Some owners find it expensive and heavy for everyday carry.
The NOCO Boost X GBX155 is a high-performance portable lithium car battery jump starter rated at 4,250 amps for 12-volt batteries in vehicles up to 10.0-liter gasoline and 8.0-liter diesel engines. Engineered for cars, trucks, SUVs, motorcycles, ATVs, boats, RVs, vans, and tractors, this advanced auto battery jump starter delivers extreme jump starting power and maximum energy transfer with every start. Featuring NOCO’s latest UltraSafe 2.0 technology, the GBX155 offers enhanced thermal efficiency, power management, and upgraded spark-proof and reverse polarity protection—making it one of the safest and most powerful booster pack jump starters in its class. It functions as a portable jump starter power pack with USB-C Power Delivery, enabling lightning-fast recharges and power for your favorite USB-C devices like smartphones, tablets, laptops, and wearables. Go from 0% to jump starting in just 5 minutes of charge—making it the ultimate emergency car battery jump starter for fast-paced lifestyles. Whether you need a self jump starter for car, a battery booster for your truck, or a compact, portable battery jump starter for daily driving and adventure, the GBX155 is built to deliver unmatched speed, safety, and starting performance wherever you go.
