NOCO 4,250-Amp UltraSafe Lithium Jump Starter - GBX155
NOCO Boost X GBX155 is a portable lithium jump starter for 12-volt batteries in vehicles up to 10.0-liters gasoline and 8.0-liter diesel engines, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more.
Features
- An all-new design with extreme jump starting power for powerful engine starts. Rated at 4250-amps, this portable lithium car battery jump starter releases maximum energy at every start. This isn't an upgrade. It's a whole new series - the Extreme Series.
- Equipped with USB-C technology that, combined with power delivery, gives you lightning-fast recharges. Completely recharges in just 2.7-hours, or go from 0% to jump starting in just 5-minutes of charge.
- Charge everything with USB-C Power Delivery. Its internal power bank provides 60-watts of power - both in and out - to effortlessly power your favorite USB-C devices, like phones, tablets, laptops, wearables, and more.
- We took our UltraSafe technology and made it better. It's still our simple, mistake-free design featuring spark-proof technology and reverse polarity protection, but with enhanced thermal efficiency and power management to provide better performance and longer battery life.
- It's one of the most versatile lithium jump starters ever. Jump start all vehicle types, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more for up to 10.0-liter gasoline and 8.0-liter diesel engines.
What our Experts Think
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Massive Power: 4,250-amp peak current jump-starts gasoline engines up to 12L and diesel engines up to 10L.
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UltraSafe Technology: Spark-proof and reverse-polarity protection ensures worry-free operation.
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Portable & Compact: Lightweight design fits easily in vehicles for emergency use.
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Multi-Functional: Doubles as a USB power bank for charging phones, tablets, and other devices.
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Durable Lithium Battery: Long-lasting, reliable performance with extended shelf life.
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Expert Recommended: Ideal for roadside emergencies, professional mechanics, and everyday vehicle readiness.
Q&A
Q: What is the NOCO GBX155?
A: A 4,250-amp UltraSafe lithium jump starter for cars, trucks, and boats.
Q: What vehicles does it support?
A: Gas engines up to 10L, diesel engines up to 6L.
Q: Is it safe to use?
A: Yes, features spark-proof, reverse-polarity protection for ultra-safe operation.
Q: Can it charge devices?
A: Yes, includes USB ports for smartphones, tablets, and other devices.
Q: How portable is it?
A: Compact and lightweight, easy to store in vehicles.
Q: What sets it apart?
A: High 4,250-amp output, UltraSafe lithium technology, and multi-device charging capability.
Maintenance Tips
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Keep fully charged when not in use
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Store in a cool, dry place
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Clean terminals regularly
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Avoid exposure to water or moisture
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Inspect cables and connections before each use
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Do not drop or expose to extreme heat
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Recharge every 3–6 months if unused
Damage 
Loss 
Theft 
