NOCO Boost X GBX155 Review: Worth It? (October 2026)
The NOCO GBX155 suits drivers who need a high-output jump starter for large gas or diesel engines. Its USB-C charging and device power add convenience, while its weight and 18-start limit matter when choosing a kit.
On this page (11 sections)
- NOCO GBX155 review: who should consider it?
- What does the NOCO GBX155 offer?
- How should you choose a jump starter for your vehicle?
- How does the GBX155 compare with the GB150?
- Is the GBX155 worth choosing over the GBX75?
- What are the GBX155's limits?
- How should you set up and care for the GBX155?
- Does the GBX155 work as a power bank and flashlight?
- How does the GBX155 compare with a lead-acid jump starter?
- Which NOCO GBX155 alternative should you choose?
- Verdict: should you buy the NOCO GBX155?
The NOCO GBX155 is a high-output lithium jump starter for large gas and diesel engines. Its stated limits reach 10.0L gas and 8.0L diesel, and USB-C Power Delivery lets it recharge the pack and power compatible devices.
That capacity comes with trade-offs: the unit weighs 7 lb and is rated for up to 18 starts per charge. If your vehicle needs less output, the lighter GBX75 may fit better; if you value a higher stated start count, compare the GB150.
NOCO GBX155 review: who should consider it?
The GBX155 fits drivers whose vehicle falls within its stated engine range and who want a portable lithium pack with fast USB-C charging. It also makes sense for a roadside kit where a built-in light and device charging are useful.
NOCO Boost GBX155: Best for large engines
- 4,250 A
- Up to 10.0L gas and 8.0L diesel
- 60 W USB-C Power Delivery
- Up to 18 jump starts per charge
A high-output lithium unit with a short stated recharge time and two-way USB-C power. Its weight and stated starts per charge are worth weighing against those features.
Pros
- Highest output of these four models
- Rated for large gas and diesel engines
- Can gain jump-start power in 5 minutes
- 60 W USB-C output and 500-lumen light
Cons
- Weighs 7 lb
- Up to 18 starts per charge is fewer than the GB150's stated 80
NOCO rates the GBX155 at 4,250 amps and says it can provide enough power for a jump start after 5 minutes of charging, even when depleted. Its full recharge time is 2.7 hours through USB-C Power Delivery.
Skip it if your engine needs less capacity and you would rather carry a lighter unit. At 7 lb, the GBX155 is portable, but the 5 lb GBX75 is easier to move and has a shorter stated full recharge time.
It may also be the wrong fit if you expect many starts between charges. NOCO rates the GBX155 for up to 18 starts per charge, while the GB150 is rated for up to 80.
What does the NOCO GBX155 offer?
The GBX155 combines high output, two-way USB-C power and a built-in flashlight. Those features make it useful as part of a vehicle emergency kit, provided its weight and charge routine fit your needs.
Its 60 W USB-C port charges compatible phones, tablets and laptops, and it can also accept power for recharging the jump starter. The integrated 500-lumen light has seven modes, including SOS and strobe.
The package includes heavy-duty clamps, a USB-C charging cable and a microfiber storage bag. NOCO backs the GBX155 with a 1-year limited warranty.
How should you choose a jump starter for your vehicle?
Choose by engine size and fuel type first, then compare output, weight, recharge time and the number of starts per charge. A large peak amp figure alone doesn't tell you whether a unit is the right match for your vehicle.
Check your vehicle manual for engine displacement and fuel type. Compare those details with the jump starter's stated engine limits, and follow both manuals for safe connections and use.
Think about where you'll keep the pack and how often you'll use it. If it will stay in a vehicle emergency kit, measure the storage space and consider the weight; if it will serve several vehicles, compare their engine requirements and how many starts you may need between recharges.
The V8 jump starter guide explains how to compare engine fit across trucks and SUVs. For additional large-engine options, see heavy-duty jump starters.
How does the GBX155 compare with the GB150?
The GBX155 has more output and higher stated engine limits, while the GB150 has a much higher stated start count per charge. Pick according to your vehicle's requirements and whether capacity or repeated use matters more.
| Model | Peak output | Gas and diesel ratings | Starts per charge | Full recharge |
|---|---|---|---|---|
| GBX155 | 4,250 A | 10.0L gas, 8.0L diesel | Up to 18 | 2.7 hours |
| GB150 | 3,000 A | 9.0L gas, 7.0L diesel | Up to 80 | 7 hours |
The GB150 weighs 7.5 lb, half a pound more than the GBX155. Its slower recharge is a trade-off if you need to restore the pack soon after using it.
See the full NOCO GBX155 vs GB150 comparison for a closer look at their features and fit.
Is the GBX155 worth choosing over the GBX75?
Choose the GBX155 for larger stated engine limits, or the GBX75 if carrying less weight and recharging faster matter more. The GBX75 weighs 5 lb, is rated at 2,500 amps, and has a stated full recharge time of 1.8 hours using 60 W USB-C Power Delivery.
The GBX75 is rated for engines up to 8.5L gas and 6.5L diesel, and up to 12 starts per charge. Like the GBX155, it can gain enough charge for a jump start in 5 minutes and has two-way 60 W USB-C power.
If you want to compare more models in the brand's range, see the best NOCO jump starters by model. Drivers focused on carrying a smaller pack can also compare portable jump starters for the glovebox.
What are the GBX155's limits?
The main trade-offs are weight, start count and its USB-C charging setup. Consider them before buying, especially if you plan to use one pack for multiple vehicles.
At 7 lb, the GBX155 is heavier than the GBX75. Its stated maximum of 18 starts per charge is also lower than the GB150's 80, so the GB150 is a stronger fit for buyers who prioritize the number of starts between charges.
The full recharge time is 2.7 hours through USB-C Power Delivery. The 5-minute feature provides enough power for a jump start, not a full recharge, so keep the pack charged and use a suitable charger and cable.
How should you set up and care for the GBX155?
Read the instructions and charge the GBX155 before storing it for an emergency. Learn the clamp connections and controls while you're somewhere safe, so you can follow the correct steps if the vehicle won't start.
Before a jump, confirm that the pack and vehicle are compatible and that you can reach the battery safely. Use the vehicle and NOCO instructions for connection order, clamp placement and when to remove the clamps.
After use, disconnect the unit as directed and recharge it. Keep the charging cable and clamps with the pack, and check its charge periodically so it is ready when needed.
A common mistake is treating the 5-minute quick-charge feature as a reason to leave the pack depleted. It can provide enough power for a jump, but keeping the unit charged gives you a more dependable starting point.
Another mistake is assuming protection features replace careful connections. UltraSafe 2.0 includes spark-proof and reverse polarity protection, but you should still confirm the correct terminals and follow the instructions.
Does the GBX155 work as a power bank and flashlight?
Yes. Its 60 W two-way USB-C port can charge compatible devices, and its built-in light offers seven modes, including SOS and strobe.
Use the USB-C port for a phone, tablet or laptop when needed, while keeping enough charge available for jump-start use. The light can help illuminate roadside work or a dark storage area, but use it with care near traffic.
How does the GBX155 compare with a lead-acid jump starter?
The GBX155 is a 7 lb lithium pack rated at 4,250 amps, while the Clore JNC770R is a 23 lb lead-acid and AGM model rated at 1,700 peak amps and 425 cranking amps. The Clore has 68 in leads, a built-in 3 A automatic charger and a master on/off switch.
The Clore suits a buyer who values long cable reach and a built-in charger, and who can accommodate a much heavier unit. Skip it if you want a pack that is easier to carry between vehicles.
For more on choosing between battery types, read lithium vs lead-acid jump starters.
Which NOCO GBX155 alternative should you choose?
Choose the GBX155 when its higher output and engine ratings matter most. Choose the GB150 for its higher stated start count, or the GBX75 for lower weight and a shorter full recharge time.
The Clore JNC770R is the fit for someone who prefers a lead-acid and AGM unit with long leads and a built-in charger, and who doesn't need a lightweight pack. If none of these trade-offs match your needs, compare your vehicle's requirements with the broader NOCO jump starter lineup.
Verdict: should you buy the NOCO GBX155?
Buy the NOCO GBX155 if your vehicle fits its gas or diesel ratings and you want high output with fast USB-C charging. Choose the GB150 if you need more starts per charge, or the GBX75 if you want to carry less weight and recharge faster.
Before deciding, check your engine size, storage space and charging routine, then read the jump starter instructions. The NOCO GBX155 vs GB150 comparison can help you make the final choice.
Frequently asked questions
What engines can the NOCO GBX155 jump start?
The GBX155 is rated for gas engines up to 10.0 liters and diesel engines up to 8.0 liters. Check your vehicle manual and the jump starter instructions for compatibility and connection steps before use.
How long does the GBX155 take to recharge?
NOCO gives a 2.7-hour recharge time using USB-C Power Delivery. The GBX155 can also gain enough power for a jump start in 5 minutes, even from a completely depleted battery.
How many starts can the GBX155 provide per charge?
The GBX155 is rated for up to 18 jump starts per charge, and its integrated 60-second timer conserves power. Keep it charged and follow NOCO's instructions for storage and recharging.
Is the GBX155 better than the GB150?
Choose the GBX155 for higher output, larger stated engine ratings and faster USB-C recharging. The GB150 has lower output and engine limits, but is rated for up to 80 starts per charge compared with the GBX155's up to 18.
