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NOCO Boost Plus GB40 Jump Starter vs AstroAI S8 Jump Starter

Both are compact lithium jump starters rated for 6.0L gas and 3.0L diesel, so engine coverage is a tie. The AstroAI S8 claims higher peak current and more battery capacity, but the NOCO GB40 has the longer track record: 4.6 stars from nearly 2,000 ratings, IP65 sealing, and UltraSafe spark-proof clamps that owners and reviewers consistently call foolproof. Buy the GB40 for proven safety electronics and a glovebox-friendly shape; buy the S8 if you want more rated current and dual USB ports for the same class of engine.

  • Choose the NOCO Boost Plus GB40 if you want the better-known unit with spark-proof, reverse-polarity protection and a sealed IP65 body.
  • Choose the AstroAI S8 if you want higher rated peak amps, dual USB outputs and a larger battery in the same engine class.

Prices

  • NOCO Boost Plus GB40 Jump Starter: $99.95 at Best Buy (checked today)
  • AstroAI S8 Jump Starter: $42.19 at Amazon (checked today)
  • Difference: the AstroAI S8 Jump Starter is $57.76 cheaper than the NOCO Boost Plus GB40 Jump Starter today
NOCO
NOCO Boost Plus GB40 Jump Starter

NOCO Boost Plus GB40 Jump Starter

4.6(1,983 ratings)
$99.95at Best BuyChecked 3 h ago
See all prices and details
Visit Best Buy
Pros
  • Spark-proof clamps and reverse polarity protection make hookup hard to get wrong
  • IP65 sealed against dust and water spray
  • Compact enough for a glovebox
  • Holds charge up to a year between top-ups
  • Long, well-documented owner base
Cons
  • Lower peak amps than the S8
  • One USB port only
  • Capped at 3.0L diesel
AstroAI
AstroAI S8

AstroAI S8 Jump Starter

AstroAI S8

4.3(7 ratings)
$42.19at AmazonChecked 3 h ago
See all prices and details
Visit Amazon

As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • 1,500 peak amps, the higher rating of the two
  • 37 Wh battery, more reserve for repeated jumps
  • Two USB ports for charging devices
  • Slightly lighter than the GB40
  • Wide operating range, -20°C to 50°C
Cons
  • No IP rating listed
  • Safety features less documented than NOCO UltraSafe
  • Fewer owner reviews to judge long-term reliability

What separates them

NOCO Boost Plus GB40 Jump StarterAstroAI S8 Jump Starter
Peak current1,000 amps1,500 amps
Engine coverageUp to 6.0L gas, 3.0L dieselUp to 6.0L gas, 3.0L diesel
Battery capacity24 Wh, 2150 mAh37 Wh
Safety electronicsUltraSafe spark-proof clamps and reverse polarity protectionNot specified beyond standard clamps
Water and dust sealingIP65 ratedNot rated
USB outputsOne power-bank USB portTwo USB ports at 5V 2.4A
WeightAbout 1,200 gAbout 1,100 g
Track record4.6 stars from 1,983 ratingsFewer ratings and less owner feedback

Price history

$99.95$34.99
Oct 28Nov 10
  • NOCO Boost Plus GB40 Jump Starter: lowest $99.95 on Oct 28 at Micro Center; $99.95 on Nov 10.
  • AstroAI S8 Jump Starter: lowest $34.99 on Nov 10 at Woot.

Prices at every store

NOCO Boost Plus GB40 Jump Starter

  • WalmartNew

    In stockSold by NOCO

    $99.95Free shippingChecked 3 h ago
    Visit Walmart
  • Home DepotNew

    In stock

    $99.95Free shippingChecked 3 h ago
    Visit Home Depot
  • NOCONew

    In stock

    $99.95Free shippingChecked 3 h ago
    Visit NOCO
  • Best BuyNew

    In stock

    $99.95Free shippingChecked 3 h ago
    Visit Best Buy

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay
  • Bulldog Battery, Inc.Check price at Bulldog Battery, Inc.

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All 17 stores and price history →

AstroAI S8 Jump Starter

  • eBayNew

    In stockSold by yexin15

    $54.99Free shippingChecked 3 h ago
    Visit eBay
  • ACO SupplyNew

    In stock

    $59.99Free shippingChecked 3 h ago
    Visit ACO Supply
  • Shop Audio DepotNew

    In stock

    $52.99+ $10.00 shippingChecked 3 h ago
    Visit Shop Audio Depot
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $42.19Free shippingChecked 3 h ago
    Visit Amazon

Store links may earn us a commission.

All 8 stores and price history →

Specs compared

SpecNOCO Boost Plus GB40 Jump StarterAstroAI S8 Jump Starter
Jump-start current1,000-amps—
Gasoline engine sizeUp to 6.0L—
Diesel engine sizeUp to 3.0L—
Jump starts per chargeUp to 20 jump starts—
Battery typelithium-ion—
Flashlight brightness100-lumen—
Dimensions7-3/4"L x 3-1/4"W x 1-3/4"D—
Battery capacity2150 mAh—
Power capacity24 Wh—
IP ratingIP65—
Weight1200 g—
colorGray—
Show all 25 specsShow fewer specs
SpecNOCO Boost Plus GB40 Jump StarterAstroAI S8 Jump Starter
size1000A—
Peak current—1500 Amps
Battery cell composition—Lithium-Nickel Manganese Cobalt (NMC)
Voltage—12 Volts
Item weight—1.1 kg
Product dimensions—6.35 x 13 x 22.02 cm
Capacity—37 Wh
Inrush current—300 A
USB output—USB1 + USB2 (5V, 2.4A)
USB input

What reviewers say

NOCO Boost Plus GB40 Jump Starter

  • 4.6 / 51,983 ratings

With 4.6 out of 5 from 1,983 ratings, owners mostly report it does exactly what it is supposed to do. Some used it during a blackout to charge devices and provide light.

What people mention
  • Starting powerPraisedOwners say it starts dead batteries as advertised.
  • Safety clampsPraisedSpark-proof, reverse-polarity protection makes hookup mistake-proof.
  • SizePraisedSmall enough to keep in the glovebox or trunk.
  • Diesel limitsCriticisedOnly rated for diesel engines up to 3.0L.

AstroAI S8 Jump Starter

Owners generally describe the S8 as a small, dependable booster that starts cars and small engines without fuss. Complaints center on the modest battery reserve and on clamps that feel less sturdy than the unit itself.

What people mention
  • Starting powerPraisedOwners say it fires up cars, SUVs and lawnmowers on the first attempt.
  • SizePraisedBuyers like that it fits in a glovebox or under a seat.
  • Battery reserveCriticisedSome owners find it needs recharging after only a few jump starts.
  • ClampsCriticisedThe jumper clamps and cables are described as short and stiff in cold weather.

Questions and answers

Which is better for a diesel truck?
Both are rated only up to 3.0L diesel, so neither is the pick for a full-size diesel. For a 3.0L or smaller diesel, the S8's higher peak current gives more margin.
Which one lasts longer?
The GB40 has the longer public track record, with nearly 2,000 ratings and a sealed IP65 body. The S8 carries a larger battery, but fewer owners have reported on its long-term durability.
Is the S8 worth stepping up to over the GB40?
Step up if you want more peak amps, a bigger battery and two USB ports. Stay with the GB40 if spark-proof clamps and water resistance matter more to you.
Can either one charge my phone?
Yes. The GB40 has a USB power-bank port; the S8 has two USB outputs at 5V 2.4A, so it can charge two devices at once.
Will either start a 6.0L gas engine?
Yes. Both are rated for gasoline engines up to 6.0L, covering most cars, SUVs and light trucks.
Do I need to recharge them often?
The GB40 holds its charge for up to a year. The S8 takes about 4.5 hours for a full charge, so top it up a couple of times a year.

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  • Noco Boost X GBX45 vs AstroAI S8

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Fast charging (5V, 3A)
Operating temperature—-20°C to 50°C
Charging temperature—-10°C to 45°C
Charging time—approximately 4.5 hours