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Comparison Jump Starters

NOCO GB40 vs NOCO GBX45: Which Should You Buy?

Quick answer

Choose the NOCO GB40 for most cars and small SUVs; choose the GBX45 if you drive a V8 truck or larger SUV, or want USB-C charging.

By Buyzello Editorial Team 1 min read

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Illustration of jump starters (not a photo of this product)
Recommended

NOCO Boost Plus GB40

Best for most cars

Typically $90–$110

Check Price on Amazon at Amazon Paid link
Illustration of jump starters (not a photo of this product)
Recommended

NOCO Boost X GBX45

Best for trucks and bigger SUVs

Typically $130–$160

Check Price on Amazon at Amazon Paid link

Quick comparison

FeatureNOCO Boost Plus GB40NOCO Boost X GBX45
VerdictRecommendedRecommended
Typical price$90–$110$130–$160
Best forMost carsTrucks and bigger SUVs
Key featureCompact lithium jump starter with spark-proof clampsMore power in a still-compact box
Peak current1,000 A1,250 A
EnginesUp to 6.0L gas, 3.0L dieselUp to 6.5L gas, 4.0L diesel
BatteryLithium-ion—
Charging—USB-C
Where to buyCheck Price at Amazon Paid linkCheck Price at Amazon Paid link

Main differences

Engine size

GB40 covers up to 6.0L gas; GBX45 up to 6.5L gas and 4.0L diesel.

Charging

GBX45 adds USB-C in and out.

Price

GB40 costs about $30 to $50 less.

Safety

Both have spark-proof clamps and reverse-polarity protection.

Which should you choose?

Choose the NOCO Boost Plus GB40 if you

  • drive a typical car or small SUV
  • want the lowest price
  • want a glove-box size
Check Price at Amazon Paid link

Choose the NOCO Boost X GBX45 if you

  • drive a truck or big SUV
  • want USB-C charging
  • own a small diesel
Check Price at Amazon Paid link

Which specifications matter?

Focus on the differences above rather than headline numbers. For more options, see our list of the best portable jump starters.

Not sure about either? Consider these

Frequently asked questions

Which is better, the NOCO GB40 or the NOCO GBX45?

Choose the NOCO GB40 for most cars and small SUVs; choose the GBX45 if you drive a V8 truck or larger SUV, or want USB-C charging.

Which is better value?

The NOCO GB40 typically costs $90–$110 and the NOCO GBX45 typically costs $130–$160. The better value depends on which differences above matter to you.

Buyzello Editorial Team

Part of the Buyzello research team. We compare specifications, documentation and real-world trade-offs so you can decide faster.

How we test and score Editorial policy

NOCO GB40 vs NOCO GBX45: the deciding differences

NOCO GB40 vs NOCO GBX45: which should you buy? Choose the NOCO GB40 for most cars and small SUVs; choose the GBX45 if you drive a V8 truck or larger SUV, or want USB-C charging. Typical prices are $90–$110 for the NOCO GB40 and $130–$160 for the NOCO GBX45.

The NOCO GB40 is best for most cars. Its key feature is compact lithium jump starter with spark-proof clamps. Buy it if you drive a typical gas car or small SUV and want a compact, safe jump starter in the glove box. Owners and specs point to strengths such as spark-proof, reverse-polarity protection, small enough for a glove box and charges phones and has an LED light, while the main drawbacks are not for large diesels and recharge it every few months.

The NOCO GBX45 is best for trucks and bigger SUVs, with more power in a still-compact box as its headline feature. Buy it if you drive a V8 truck or larger SUV and want more cranking power than the GB40. Its strengths include more power than the GB40, USB-C charging in and out and same spark-proof safety; the trade-offs are costs more and still not for very large diesels.

The differences that matter most: Engine size: GB40 covers up to 6.0L gas; GBX45 up to 6.5L gas and 4.0L diesel. Charging: GBX45 adds USB-C in and out. Price: GB40 costs about $30 to $50 less. Safety: Both have spark-proof clamps and reverse-polarity protection.

Choose the NOCO GB40 if you drive a typical car or small SUV, want the lowest price and want a glove-box size. Choose the NOCO GBX45 if you drive a truck or big SUV, want USB-C charging and own a small diesel. If neither fits, our list of the best jump starters covers more options at different prices.

Match the engine rating, not peak amps: makers list the gas and diesel engine sizes each model handles. Look for spark-proof clamps and reverse-polarity protection. Lithium packs hold charge for months; lead-acid boosters need regular top-ups.

Use the engine-size rating instead. Peak amps are measured differently by each maker. A GB40-class unit covers most four- and six-cylinder cars. Lithium packs dislike extreme heat. Check the storage range in the manual, and bring it inside during heat waves.

Jump starters are frequent Prime Day and Black Friday deals, and they make good holiday gifts. Register NOCO products for warranty support and keep the receipt.