NOCO Boost Sport GB20 vs Boost Plus GB40
Both carry the same 24 Wh battery, yet NOCO rates the GB40 for bigger engines: 6.0 L gas and 3.0 L diesel, against 4.0 L gas and no diesel for the GB20. If your engine is over 4.0 liters or diesel, the GB40 is the one of the two that is rated for it.
Checked against sources on by the TrueAmps editorial team.
| Spec | Boost Sport GB20 | Boost Plus GB40 |
|---|---|---|
| Gas engines up to | 4.0 L | 6.0 L |
| Diesel engines up to | not recommended | 3.0 L |
| Peak current | 500 A | 1,000 A |
| Internal battery | 24 Wh | 24 Wh |
| Weight | 2.1 lb | 2.45 lb |
| Safety listing | UL 2743 | UL 2743 |
Choose the Boost Sport GB20 if
Your engine is gas and 4.0 liters or smaller.
See NOCO Boost Sport GB20 on Amazon (paid link)
Choose the Boost Plus GB40 if
Your engine is between 4.0 and 6.0 liters gas, or a diesel up to 3.0 liters.
See NOCO Boost Plus GB40 on Amazon (paid link)
Questions people ask
Is the GB40 worth it over the GB20?
By NOCO's ratings, the GB40 covers engines up to 6.0 L gas and 3.0 L diesel; the GB20 stops at 4.0 L gas and is not recommended for diesel. Whether that matters depends on your engine.
Do the GB20 and GB40 have the same battery?
NOCO lists a 24 Wh internal battery for both.