NOCO Boost Plus GB40 vs Boost X GBX45
On NOCO's spec pages the GBX45 is ahead on every rating: 1,250 A against 1,000 A, 6.5 L gas against 6.0, 4.0 L diesel against 3.0, 31 Wh against 24, and it is listed lighter. It also charges over USB-C at up to 20 V and 3 A.
Checked against sources on by the TrueAmps editorial team.
| Spec | Boost Plus GB40 | Boost X GBX45 |
|---|---|---|
| Gas engines up to | 6.0 L | 6.5 L |
| Diesel engines up to | 3.0 L | 4.0 L |
| Peak current | 1,000 A | 1,250 A |
| Internal battery | 24 Wh | 31 Wh |
| Weight | 2.45 lb | 2.16 lb |
| Safety listing | UL 2743 | UL 2743 |
Choose the Boost Plus GB40 if
Your engine sits comfortably inside 6.0 L gas or 3.0 L diesel and you do not need fast USB-C charging.
See NOCO Boost Plus GB40 on Amazon (paid link)
Choose the Boost X GBX45 if
Your diesel is between 3.0 and 4.0 liters, or you want USB-C charging at up to 20 V and 3 A.
See NOCO Boost X GBX45 on Amazon (paid link)
Questions people ask
What is the difference between the NOCO GB40 and GBX45?
NOCO rates the GBX45 higher: 1,250 A peak, 6.5 L gas, 4.0 L diesel and a 31 Wh battery, against 1,000 A, 6.0 L, 3.0 L and 24 Wh for the GB40. The GBX45 also has USB-C input and output up to 20 V at 3 A.