Price: $219.95 - $174.95
(as of Dec 09, 2025 17:05:31 UTC – Details)
The GBX55 Boost X is a new class of portable lithium jump starters—engineered for extreme performance and rated at 1,750 amps to start gas engines up to 7.5 liters and diesel engines up to 5.0 liters. Featuring our upgraded UltraSafe 2.0 technology, it offers spark-proof connections and reverse polarity protection, now with enhanced thermal efficiency and power management for even greater safety and battery life. Designed with a high-voltage output system, the GBX55 includes an integrated 60-second timer to conserve energy—delivering up to 9 jump starts per charge with maximum power on every start. Even if completely depleted, it can gain enough power for a jump start in just 5 minutes or fully recharge in only 1.2 hours via USB-C Power Delivery. A 60-watt USB-C port provides both input and output, turning Boost X into a high-performance power bank for fast charging phones, tablets, laptops, and other USB-C devices. A precision-engineered 200-lumen LED flashlight features seven modes, including SOS and strobe, to light up dark workspaces or help in roadside emergencies. The GBX55 jump starter comes complete with heavy-duty jumper clamps, a USB-C charging cable, and a microfiber storage bag, all backed by a 1-year limited warranty and proudly engineered in the USA. Whether you’re looking for a car jump starter, battery jump box, jumper pack, power pack jump starter, or a reliable jump starter battery pack to keep in your glovebox, the GBX55 delivers unmatched performance, trusted durability, and peace of mind—on the road, off the grid, or wherever your next adventure takes you.
X FOR EXTREME — A new class of lithium jump starters. Rated at 1,750 amps for powerful starts on gas engines up to 7.5L and diesel engines up to 5.0L – built for extreme performance.
ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with enhanced thermal efficiency and power management for even safer operation and extended battery life.
TURBO CHARGEABLE — Recharges in just 1.2 hours via USB-C Power Delivery, or gain enough power for a jump start in just 5 minutes – even from a completely depleted battery.
60-SECOND TIMER — Integrated 60-second timer conserves power from its high-voltage design – delivering up to 9 jump starts per charge with extreme energy at every start.
CHARGE EVERYTHING — 60-watt USB-C Power Delivery lets you charge phones, tablets, laptops, and more. Dual-direction charging turns Boost X into a high-output portable power bank.
INTEGRATED LED FLASHLIGHT — Precision-engineered 200-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments.
WHAT’S IN THE BOX — GBX55 jump starter, heavy-duty clamps, USB-C charging cable, and microfiber storage bag. Backed by a 1-year warranty and engineered in the USA.
Customers say
Customers find the jump starter works well, particularly with Chevy 1500 vehicles, and appreciate its compact size and ease of use compared to standard jumper cables. The product is handy to carry and customers consider it worth the cost. However, the charge rate and durability receive mixed feedback – while some say it fully charges, others report it won’t charge at all, and while some units last over two years, others fail after two uses.
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