Our verdict on the NOCO Boost Plus GB40
- Buy it if
- You drive a typical petrol car or small SUV and want a compact, safe jump starter in the glove box.
- Skip it if
- You drive a big diesel truck; you need a larger model.
- Best for
- Most cars
- Key feature
- Compact lithium jump starter with spark-proof clamps
- Typical price
- £79–£99
Key specifications
| Peak current | 1,000 A |
|---|---|
| Engines | Up to 6.0L gas, 3.0L diesel |
| Battery | Lithium-ion |
Who should buy it, and who should skip it
A good fit if you
- drive a typical petrol car or small SUV
- want a glove-box jump starter
- want simple, safe hookups
Skip it if you
- drive a large diesel truck
- want a garage booster
Pros and cons
Pros
- Spark-proof, reverse-polarity protection
- Small enough for a glove box
- Charges phones and has an LED light
Cons
- Not for large diesels
- Recharge it every few months
What it is
The NOCO Boost Plus GB40 is a compact lithium jump starter rated at 1,000 peak amps. NOCO rates it for gas engines up to 6.0 litres and diesels up to 3.0 litres, which covers most sedans, crossovers and many pickups. It also has a USB port for phones and a built-in LED light.
What we like
- Spark-proof clamps and reverse-polarity protection
– Small enough for a glove box or door pocket
– Holds a charge for months, according to owner reports
– Doubles as a phone charger and torch
What to know
- Not rated for large diesel engines
– Charges by micro-USB, which feels dated
– Recharge it every few months and after each jump
– Avoid leaving it on a dashboard in summer heat
Is it worth it?
Based on specs, warranty and years of owner feedback, the GB40 is the easiest jump starter to recommend for everyday drivers. It costs about the same as a tow call, lives in the glove box and turns a dead battery into a five-minute fix. Truck owners should pay a little more for the GBX45.
Alternatives worth considering
NOCO · Jump Starters
NOCO Boost X GBX45
Buy it if You drive a V8 truck or larger SUV and want more cranking power than the GB40.
- Verdict
- Buy
- Best for
- Trucks and bigger SUVs
- Typical price
- £119–£149
Pros
- More power than the GB40
- USB-C charging in and out
Cons
- Costs more
GOOLOO · Jump Starters
GOOLOO GP4000 Jump Starter
Buy it if You want a lot of rated power for big engines without paying NOCO prices.
- Verdict
- Buy
- Best for
- Value for big engines
- Typical price
- £79–£119
Pros
- Strong value
- Large built-in power bank
Cons
- Peak-amp claims are marketing numbers
Frequently asked questions
Is the NOCO Boost Plus GB40 worth it?
For most cars and small SUVs, yes. The GB40 is compact, spark-proof and owners report it holds a charge for months in the glove box. Skip it if you drive a big diesel truck; step up to a larger NOCO.
Who should skip it?
If you drive a large diesel truck, an alternative will suit you better.
How many jumps does the GB40 give per charge?
NOCO rates it for up to 20 jumps on a full charge, depending on engine size and conditions.