Boost X 4250Amp 12Volt UltraSafe Jump Starter (GBX155)

Equip yourself with the ultimate rescue tool: the NOCO Boost X GBX155—a powerhouse 12-volt jump starter that’s built to handle the toughest emergencies and everyday power needs.

• Massive 4,250 Amps of Starting Power: Designed to reliably revive 12 V lead-acid batteries in cars, trucks, RVs, boats and more. This unit handles gasoline engines up to 10.0 liters and diesel engines up to 8.0 liters. 
• Lightweight and Portable (5.82-lb, 99 Wh): With a compact footprint (12″ × 6-15/16″ × 2-3/4″) and rugged build, it slips easily into your trunk, toolbox or gear bag so you’re always ready. 
• Ultra-Fast USB-C Charging & Multi-Device Output: Recharge the unit fully in approx. 2.7 hours and get back on the road fast. The built-in 60 W USB-C output turns this jump starter into a powerful mobile charger for phones, tablets, and even laptops. 
• Built-in 500-Lumen LED Work Light with SOS/Strobe: When roadside emergencies strike at night or in low-light situations, the bright LED light offers visibility and safety.
• Ultra-Safe Technology for Mistake-Free Use: Features spark-proof clamps and reverse-polarity protection, ensuring safe operation even if you’re under stress.
• Durable, All-Weather Performance: Rated for operation from –4 °F to 122 °F, with an IP65 rating when ports are closed, it’s engineered for rugged conditions. 
• Supports Multiple Battery Types: Compatible with wet cell, gel cell, maintenance-free, enhanced flooded (EFB), and AGM-type batteries in 12 V systems. 
• Smart Power Management for Longevity: The internal lithium-ion pack is optimized for thermal efficiency and power stability, allowing years of dependable performance without constant maintenance. 
• Built for the Real World: Whether you’re an everyday commuter, weekend adventurer, boat owner, RV enthusiast or roadside helper, this jump starter is designed to tackle all scenarios—from dead batteries to auxiliary power needs.
• Essential Spare Tool: Rather than just a jump box, this unit doubles as a portable power bank for your digital devices, making it a versatile addition to your kit for travel, camping, and emergencies.

Make the NOCO Boost X Jump Starter your go-to roadside savior and power hub. With unmatched starting power and modern USB-C convenience, you’ll be ready for the unexpected—no jumper cables, no tow truck, just reliable power when you need it most.

Includes:

• GBX155 Lithium Jump Starter
• Integrated HD Precision Battery Clamps
• 24in USB-A to USB-C Cable
• 24in 12V to USB-C Cable
• Microfiber Storage Bag
• Safety Information
• 1 Year Limited Warranty

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.