NOCO Boost X GBX55
The GBX55 is rated at 1,750 amps peak for gas engines up to 7.5 liters and diesel engines up to 5.0 liters, from a 46 Wh battery.
Checked against sources on by the TrueAmps editorial team.
- Peak current
- 1,750 A
- Internal battery
- 46 Wh
- Gas engines up to
- 7.5 L
- Diesel engines up to
- 5.0 L
- Weight
- 2.58 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 GBX55 on Amazon (paid link)
Engine rating against the rest of the line
The middle of the Boost X range
It is the size to look at when the GBX45's 4.0 L diesel rating is just short of your engine but a full truck-size unit feels like too much. The diesel rating climbs to 5.0 L and the battery grows from 31 to 46 Wh, for 0.42 lb more.
Like the rest of the Boost X line it recharges over USB-C at up to 20 V, 3 A, per NOCO.
Next size down and up
| Model | Peak A | Wh | Gas L | Diesel L |
|---|---|---|---|---|
| NOCO Boost X GBX55 | 1,750 | 46 | 7.5 | 5.0 |
| NOCO Boost X GBX45 | 1,250 | 31 | 6.5 | 4.0 |
| NOCO Boost HD GB70 | 2,000 | 56 | 8.0 | 6.0 |
Boost X GBX55: questions people ask
What is the difference between the GBX55 and GBX75?
NOCO rates the GBX75 higher on every line: 2,500 A peak, 8.5 L gas, 6.5 L diesel and 74 Wh, against 1,750 A, 7.5 L, 5.0 L and 46 Wh for the GBX55.
Check the Boost X GBX55 listing on Amazon (paid link)