NOCO Boost Max GB250 UltraSafe Jump Starter 5250A
- 5250A peak, 12V
- Gas and diesel engines up to 16L
- Class 8 trucks, buses and equipment, up to 16 cylinders
- 56W adapter and four-region AC cords included
- 600-lumen light, 7 modes
- 14.7 pounds, 19.49 x 14.17 x 9.8 inches
- UL specification, 1-year limited warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A commercial-grade lithium jump pack that starts heavy trucks, buses and farm machinery. It is large and heavy for a jump pack, and the warranty runs one year.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B08V6MJ2NRModel: GB250Category: Jump Starters
Overview
NOCO aimed the Boost Max at commercial fleets, a lithium jump pack big enough to start heavy trucks, buses and farm machinery through heavy duty clamps. Spark-proof and reverse polarity protection make the hookup safe on any twelve volt battery.
Fleet mechanics and equipment operators get truck-level starting power in one portable case, plus a USB power bank and work light. It is heavy and large for a jump pack, and the warranty runs only a year.
Who it's for
Service trucks, farms and job sites with big diesel engines suit its output and case. Everyday drivers will carry far more weight than a car needs.
Pros and cons
- Starts Class 8 trucks and buses
- Spark-proof, reverse polarity protection
- Recharges with included adapter
- International AC cords included
- Heavy for a portable pack
- Only a one-year warranty
- Device charging limited to USB output
Performance notes
Starting power comes from the large lithium pack through heavy duty clamps, and the UltraSafe circuit guards against sparks and reversed connections. Recharging runs through the included adapter, with cords for four regions.
Specifications
| Brand | Noco |
|---|---|
| Model | GB250 |
| Dimensions & fit | |
| Item weight | 14.7 pounds (about 15 lb) |
| Item Dimensions D x W x H | 19.49 x 14.17 x 9.8 inches |
| Engine size | Gas and diesel up to 16L; 6, 8, 12 and 16 cylinders |
| Capacity & performance | |
| Peak Output Current | 5250A |
| Power & efficiency | |
| Battery Type | Lithium |
| Voltage | 12V |
| Compatibility & installation | |
| Compatible with Vehicle Type | Class 8 trucks, buses, motorhomes, agricultural, construction, mining equipment |
| Included components | |
| Included Components | Jump starter, heavy-duty clamps, 56W power adapter, AC cords (AU, EU, US, UK), XGC kit, EVA case |
| Warranty & support | |
| Manufacturer Warranty Description | 1-year limited |
| Other details | |
| USB ports | Integrated USB output |
| Specification Met | UL |
| Flashlight | 600 lumens, 7 modes incl. SOS and strobe |
| Safety features | UltraSafe spark-proof and reverse polarity protection |
| Recharge time | 4 hours with 56W adapter |
Frequently asked questions
How long does the NOCO GB250 take to recharge?
It fully recharges in 4 hours with the included 56W power adapter.
Can the NOCO GB250 start a car?
It works on any 12V battery, but it is engineered for commercial and industrial engines and weighs about 15 lb.
Does the NOCO GB250 charge phones?
Yes. The integrated power bank has USB output for smartphones and tablets.
Which AC cords come with the NOCO GB250?
Cords for Australia, Europe, North America and the United Kingdom, each 60-inch (1. 5m) long.