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The NOCO GBX55 Boost X is a 12V lithium jump starter rated at 1750A, built to start 7.5L gasoline and 5.0L diesel engines in cars, trucks, boats and RVs. It doubles as a USB power bank for phones, tablets and laptops, and has a 200-lumen LED flashlight with blink and strobe modes for roadside work and signaling. Its UltraSafe design covers reverse polarity, overcurrent and overcharge protection, and Boost Mode delivers a forced start for deeply discharged batteries. It sits above NOCO's smaller GB40-class units for engine size and power, but below the GBX75 and GBX155 for very large diesel engines.
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Owners of the GBX55 generally rate it as a reliable, well-built jump starter that fires up big gas and diesel engines and holds its charge between uses. The flashlight and USB charging are frequently called useful extras. Complaints center on its size and weight and on the Boost Mode override needing care.
The NOCO GBX55 Boost X is a 12V lithium jump starter with a 1750A rating. On Boost Mode it can start a battery in 60 seconds. It works with 12V batteries in vehicles with engines up to 7.5 liters (gasoline) or 5.0 liters (diesel), including cars, trucks, boats and RVs.
Its USB ports let it act as a power bank to recharge cell phones, tablets and computers. Built-in LEDs work as a flashlight with a maximum output of 200 lumens at the 100% setting. Blink and strobe modes are available for distress signaling.
Safety features include indicators that show problems with the starter or the battery. Heat and cold indicators show when the starter is running at sub-optimal internal temperatures. Manual Override gives full manual control over the jump starter's functions.
