Head-to-head · Best Portable Jump Starters

NOCO Boost Plus GB40 vs NOCO Boost X GBX55

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

NOCO Boost Plus GB40 comes out ahead by a narrow margin (4.8 vs 4.7). The gap is mostly about daily drivers wanting reliable jump starter for sedans and SUVs — read the strengths below before deciding.

Higher ratedRanked #1 in Best Portable Jump Starters

NOCO Boost Plus GB40

4.8

$110

The Boost Plus GB40 is the best-overall pick — NOCO's flagship lithium jump starter for most cars.

Strengths

— 1000A peak UltraSafe lithium-ion
— Handles 6L gas + 3L diesel engines
— Most popular jump starter brand

Watch-outs

— Not for largest diesels (use GB70)
— Lithium needs occasional topping
— Premium pricing

$110 · Check Price on Amazon Full review →

Ranked #5 in Best Portable Jump Starters

NOCO Boost X GBX55

4.7

$170

The Boost X GBX55 is the premium NOCO pick — flagship with USB-C PD and 12.5V boost mode.

Strengths

— 1750A peak
— USB-C PD charging port
— 12.5V mode for hard-to-start engines

Watch-outs

— Pricier than GB40
— Newer model — less long-term data
— Larger footprint

$170 · Check Price on Amazon Full review →

How they stack up

NOCO Boost Plus GB40

Best overall. Most popular. Premium price.

NOCO Boost X GBX55

Premium NOCO. USB-C PD. 12.5V boost.

Specs side-by-side

Spec	NOCO Boost Plus GB40	NOCO Boost X GBX55
Peak	1000A	1750A
Engine	6L gas / 3L diesel	—
Tech	UltraSafe Lithium	—
Brand	NOCO	NOCO
USB-C	—	PD
Boost	—	12.5V mode

← See the full ranking of best portable jump starters