NOCO

NOCO Boost X GB40

Expert rating8.4 / 10

Power BanksView on no.co

Capacity:: 12
Jump Start:: 1
USB-C Output:: 60W
Weight:: 2.4 lb (1.1kg)

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Manufacturer: NOCO Last updated: 2026-09-12

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NOCO Boost X GB40 (12,000mAh/1,000A Car Jump Starter + Power Bank Combo) Review

Looking for a power bank that can also jump-start a dead car battery on the side of the road, the NOCO Boost X GB40 packs 1,000A of jump-starting current into essentially the same footprint as a large phone power bank.

It's not trying to compete on mAh capacity with dedicated phone banks; the 12,000mAh here is secondary to the jump-start hardware. If your actual use case is 'my car won't start' rather than 'my phone is dead,' this is the only thing on this list built for it, and it happens to charge devices too.

Jump Starting vs. Device Charging

The 1,000A rating and spark-proof clamps are the entire point of this product. It can restart a stalled engine dozens of times per charge, but the 44Wh battery behind it means it's a mediocre phone charger by comparison (a handful of phone charges at best) compared to a bank built purely for capacity.

Comparison to Alternatives

None of the other 30 power banks in this catalog can jump a car. The closest comparison is really a category difference: a standard 20,000mAh phone bank like the INIU 140W will outlast the GB40 for device charging many times over, but is completely useless for a dead battery, which is exactly the gap the GB40 fills.

Specifications

Identity

Brand	NOCO

Size and portability

Weight	2.4 g

Model	Boost X GB40
Capacity	12000 mAh
Energy	44 Wh
Jump Starting	1,000A peak current via spark-proof clamps
USB-A Output	18W
USB-C Output	60W (Input/Output)
Recharge Input	USB-C 60W
Ports	1x USB-A, 1x USB-C, jump starter clamps
Battery Type	Lithium-ion
Ingress Protection	IP68 (fully waterproof and dustproof)
Additional Features	Built-in LED flashlight, integrated safety protections against reverse polarity and spark-back
Compatible Devices	Cars, trucks, and boats up to 6.5L gas / 4.5L diesel; phones, tablets, laptops via USB-C
Dimensions	203 x 89 x 51mm

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating8.4 / 10

Glovebox essential for anyone who drives regularly, secondary as a phone charger.

Best for

Keeping in a car or truck glovebox for emergencies
Jump-starting dead batteries on gas or diesel engines
Roadside safety kits

Not for

Primary daily phone charging (low capacity for the size)
Laptop charging (60W is workable but capacity is limited)
Anyone who doesn't drive or own a vehicle

FAQs

What are the key specifications of the NOCO Boost X GB40 (12,000mAh/1,000A Car Jump Starter + Power Bank Combo)?

The NOCO Boost X GB40 (12,000mAh/1,000A Car Jump Starter + Power Bank Combo) is a power bank from NOCO. Key specs: Capacity (mAh) 12000, Capacity (Wh) 44, Jump Starting 1,000A peak current via spark-proof clamps, USB-A Output 18W, USB-C Output 60W (Input/Output).

Who is the NOCO Boost X GB40 (12,000mAh/1,000A Car Jump Starter + Power Bank Combo) best suited to?

It suits keeping in a car or truck glovebox for emergencies, jump-starting dead batteries on gas or diesel engines, roadside safety kits.

What are the drawbacks of the NOCO Boost X GB40 (12,000mAh/1,000A Car Jump Starter + Power Bank Combo)?

It is a poor fit for primary daily phone charging (low capacity for the size), laptop charging (60w is workable but capacity is limited), anyone who doesn't drive or own a vehicle.