NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 10.0L Gas and 8.0L Diesel Engines | Spark-Proof & Reverse Polarity Protection, For Car, Truck, Motorcycle, SUV, Boat, ATV, RV, up to 10.0L Gas and

NOCO Boost X GBX155 – 4250A UltraSafe Jump Starter

The NOCO Boost X GBX155 is a 12‑volt lithium battery booster pack designed to start vehicles with engines up to 10.0 L for gasoline and up to 8.0 L for diesel. It delivers a peak current of 4250 A, allowing it to jump a wide range of motor vehicles and marine engines. The unit is built as a portable jump box that also functions as a power bank and includes jumper cables for quick connections.

Safety features are integrated into the design. The booster includes spark‑proof protection, preventing accidental sparks that could ignite fuel vapors. Reverse polarity protection is also built in, so that connecting the cables in the wrong orientation does not damage the battery or the vehicle’s electrical system. These safety measures are part of the UltraSafe technology that accompanies the product.

Because the device uses a lithium battery, it maintains a higher energy density and can deliver the high surge current needed for larger engines. Lithium chemistry also means the unit can be recharged more quickly than a traditional lead‑acid battery, and it is lighter in weight, making it easier to carry. The battery is housed in a compact chassis that houses the jumper cables and the power bank circuitry.

The jump starter is supplied with cables that allow it to be used on a variety of vehicles. It is suitable for cars, trucks, motorcycles, sport‑utility vehicles, boats, all‑terrain vehicles, and recreational vehicles. The same set of cables can be used for both gasoline and diesel engines within the specified displacement limits.

In addition to the primary jump‑starting function, the unit can double as a power bank. When the engine is running, the battery can be recharged. When the vehicle is off, the stored charge can be used to power accessories or provide a limited backup power supply. The power bank function is facilitated by the battery management circuitry built into the booster pack.

Installation is straightforward. The user connects the jump cables to the battery terminals of the vehicle, and the booster supplies the necessary current to start the engine. No special tools or modifications are required. The device includes clear indicator lights to show battery status, charging level, and safe operation.

• Peak current: 4250 A
• Operating voltage: 12 V
• Compatible engine size: up to 10.0 L gasoline, 8.0 L diesel
• Safety: spark‑proof, reverse polarity protection
• Applications: car, truck, motorcycle, SUV, boat, ATV, RV
• Functions: portable jump box, power bank, jumper cables included

Because the device is built around a lithium battery, it retains a stable output under varying temperatures. The battery management system ensures the battery is not over‑charged or over‑discharged, contributing to a longer service life. The unit is designed to be easily transported, allowing users to carry it in a vehicle’s trunk or storage compartment.

The NOCO Boost X GBX155 represents a combination of high output capability and built‑in safety for a broad range of vehicles. Its lithium construction and integrated protection features allow it to provide a reliable starting solution without the need for a second vehicle or a traditional battery.