5250A Starting Power
Delivers up to 5250A peak current for compatible petrol and diesel engines up to 16 litres.
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The NOCO Boost MAX GB250+ is a professional 5250A portable lithium jump starter for compatible 12V lead-acid batteries. Rated for petrol and diesel engines up to 16 litres, it features UltraSafe 2.0 spark-proof protection, a 600-lumen LED light, integrated voltmeter, 242Wh power bank, dual USB charging and a 12V accessory output. Ideal for trucks, buses, motorhomes, plant machinery and recovery vehicles.
Heavy-duty portable lithium starting power for compatible 12V lead-acid batteries and petrol or diesel engines up to 16 litres.
The NOCO Boost MAX GB250+ is a professional-grade 5250A portable lithium jump starter designed for compatible 12V lead-acid battery systems.
It is rated for petrol and diesel engines up to 16 litres, making it suitable for demanding commercial, industrial, agricultural, marine and recovery applications.
The GB250+ also features UltraSafe 2.0 connection protection, a 242Wh internal power bank, dual USB charging outputs, a 12V accessory output, an integrated battery voltmeter and a powerful 600-lumen LED work light.
High-output starting support for compatible 12V trucks, commercial vehicles and heavy goods vehicles.
Suitable for compatible buses, coaches, motorhomes and large leisure vehicles using 12V starting systems.
Portable starting power for compatible construction, agricultural and industrial equipment.
Designed for roadside recovery, fleet maintenance and professional workshop use.
Choose the GB250+ when you need professional starting power for large 12V vehicles and equipment. For dedicated 24V systems, choose the NOCO GB251. For fleets containing both 12V and 24V vehicles, consider the dual-voltage GB500.
Delivers up to 5250A peak current for compatible petrol and diesel engines up to 16 litres.
Designed for compatible 12V lead-acid starting batteries used in commercial vehicles and industrial equipment.
Spark-proof technology and reverse-polarity protection help reduce common connection errors during normal operation.
Dual USB outputs and a 12V accessory connection can power or recharge compatible devices and equipment.
Displays the connected battery voltage and also functions as the automatic 60-second jump-start countdown.
Seven lighting modes provide useful illumination for roadside, workshop, recovery and emergency situations.
Connect the clamps to the correct battery terminals or manufacturer-approved jump-starting points.
Switch on the GB250+ and check that the indicators confirm a correct connection.
Attempt to start the vehicle within the active 60-second jump-start window.
Switch off the GB250+, safely remove the clamps and recharge the unit where required.
Open the sections below for starting performance, safety, charging, compatibility and technical specifications.
The NOCO GB250+ delivers up to 5250A peak starting current and is designed for compatible 12V lead-acid starting batteries.
It is rated for petrol and diesel engines up to 16 litres.
Actual starting performance depends on engine size, battery condition, temperature and the vehicle manufacturer’s approved jump-starting procedure.
The GB250+ is designed for compatible 12V lead-acid starting batteries, including:
Do not use the GB250+ to jump start 6V, 24V or lithium vehicle batteries. Never attempt to start a damaged, leaking or frozen battery.
Spark-proof protection helps prevent sparking during normal clamp connection when the GB250+ is used according to its supplied instructions.
An error indicator warns the user if the positive and negative battery clamps are connected incorrectly.
Manual Override is available for deeply discharged batteries that are too low for the GB250+ to detect automatically.
Important: Manual Override disables the normal spark-proof and reverse-polarity protection. Only use it after confirming the correct polarity and reading the supplied user guide.
The internal 242Wh battery provides portable power for jump-starting and operating compatible USB or 12V devices.
Two 5V, 2.1A USB outputs can recharge compatible smartphones, tablets, cameras, headphones and other USB-powered devices.
The 12V output can supply compatible accessories at up to 15A. Always check the voltage and current requirements of the connected device.
The GB250+ can be recharged using the supplied 56W XGC power adapter or compatible 12V charging cable. A complete recharge takes approximately 8.5 hours under suitable conditions.
The built-in voltmeter displays the connected battery voltage to assist with basic diagnostics. It also displays the automatic 60-second jump-start countdown.
| Brand | NOCO |
|---|---|
| Model | GB250+ |
| Product type | Professional lithium battery jump starter |
| Supported voltage | 12V only |
| Peak starting current | 5250A |
| Maximum petrol engine | Up to 16 litres |
| Maximum diesel engine | Up to 16 litres |
| Supported battery chemistry | 12V lead-acid |
| Internal battery | 242Wh lithium-ion |
| USB outputs | Dual 5V, 2.1A maximum |
| XGC input | 12V, 4A |
| 12V accessory output | 12V, 15A maximum |
| LED work light | 600 lumens with seven modes |
| Operating temperature | -20°C to +50°C |
| Charging temperature | 0°C to +40°C |
| Storage temperature | -20°C to +50°C |
| Protection rating | IP65 with the port covers closed |
| Dimensions | 315.7mm wide × 93.5mm deep × 218.9mm high |
| Weight | Approximately 6.67kg |
| Cooling | Natural convection |
| Warranty | 1-year limited warranty |
No. The GB250+ is designed exclusively for compatible 12V lead-acid battery systems. Choose the GB251 for dedicated 24V systems or the GB500 for 12V and 24V operation.
The GB250+ is rated for compatible petrol and diesel engines up to 16 litres.
No. The GB250+ supplies temporary starting power but does not replace a battery charger or maintainer.
Yes. Its two 5V, 2.1A USB outputs can recharge compatible smartphones, tablets and other USB-powered devices.
The GB250+ is IP65-rated when its port covers are securely closed. It can withstand suitable exposure to dust and water but must not be submerged.
Yes. It includes a 56W XGC mains power adapter, charging cable and protective EVA carrying case.
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