NOCO Boost X GBX155
The GBX155 is NOCO's largest Boost X: 4,250 amps peak, a 99 Wh battery, and ratings for gas engines up to 10.0 liters and diesel engines up to 8.0 liters.
Checked against sources on by the TrueAmps editorial team.
- Peak current
- 4,250 A
- Internal battery
- 99 Wh
- Gas engines up to
- 10.0 L
- Diesel engines up to
- 8.0 L
- Weight
- 5.82 lb
- Safety listing
- UL 2743
Ratings are the manufacturer's own, from NOCO's spec page, checked September 24, 2026. Safety listing: ETL (Intertek), directory record, checked September 24, 2026.
See NOCO Boost X GBX155 on Amazon (paid link)
Engine rating against the rest of the line
Who needs this much
Ten liters of gas and eight of diesel are the top ratings in NOCO's Boost X range. If your engine sits well under that, a smaller unit does the same job and weighs less than this one's 5.82 lb.
Its 99 Wh battery is 11 Wh more than the GB150's 88 Wh, and the rating is 1,250 A higher, in a unit NOCO lists as about half a pound lighter.
Next size down and up
| Model | Peak A | Wh | Gas L | Diesel L |
|---|---|---|---|---|
| NOCO Boost X GBX155 | 4,250 | 99 | 10.0 | 8.0 |
| NOCO Boost Pro GB150 | 3,000 | 88 | 9.0 | 7.0 |
All jump starters side by side
Head to head: GB150 vs GBX155
Boost X GBX155: questions people ask
What is the biggest engine the GBX155 can start?
NOCO rates it for gas engines up to 10.0 liters and diesel engines up to 8.0 liters.
Check the Boost X GBX155 listing on Amazon (paid link)