Which engines the GBX155 is built to start
NOCO rates the Boost X GBX155 at 4250 amps. That covers gasoline engines as large as 10.0L, and it also handles diesel engines up to 8.0L. If you drive a full-size truck, a large SUV or a work van with a big-displacement engine, we'd consider this the class of jump starter made for that job.
The integrated 60-second timer manages the high-voltage output. NOCO says one charge can deliver up to 18 jump starts, which suits a vehicle you don't drive daily or a spare unit kept in the garage. The 500-lumen LED adds 7 light modes, including SOS and strobe, so the same box can light up a dark engine bay.
| Product detail | Value to match to your vehicle |
|---|---|
| Product | NOCO Boost X GBX155 |
| Model | GBX155 |
| Color | Gray |
| Size | 4250A |
What the UltraSafe 2.0 protection does not promise
NOCO describes UltraSafe 2.0 as spark-proof and reverse polarity protected, with better thermal efficiency and power management. That is protection during a jump start, not a repair for a failed battery or a charging system fault, so the jump starter starts an engine rather than diagnosing why it died.
We'd also skip assuming any jump starter certifies your vehicle as safe to drive afterward. If a battery keeps going flat, the jump box gets you moving but the underlying cause still needs proper attention.
Protected during a jump, not a diagnosis of why the battery went flat.
A jump starter does not make a failing charging system safe to drive on.
What the current price reflects
- Amazon price
- $295.96
- Customer rating
- 4.2
- Customer reviews
- 7300
- Typical price over 90 days
- $365.16
- Difference
- $69.20 (19 percent)
The jump starter is $295.96 right now, against a typical price of $365.16 over the last 90 days. That works out to $69.20 less, or about 19 percent off the usual going rate.
Charging, clamps and storage checks before you buy
Recharging runs through USB-C Power Delivery and NOCO says a full top-up takes about 2.7 hours, with enough juice for one jump after roughly 5 minutes plugged in. Confirm you have a USB-C PD source that can feed it, because a basic phone charger won't deliver the same rate.
The USB-C port also outputs power, so the same unit charges phones, tablets and laptops and works as a power bank in either direction. Check that your devices accept USB-C PD if you plan to lean on that feature. The box ships with heavy-duty clamps, a USB-C cable and a microfiber bag. Decide where the unit will live in your vehicle, since a jump starter only helps if the clamps and cables are reachable when you need them.
Who should choose this jump starter
Choose the GBX155 if your garage holds a large gas or diesel engine and you want output headroom plus a built-in power bank and work light. The 19 percent gap from its typical price makes this a reasonable moment to buy rather than wait.
Skip it if you maintain a small car with a modest battery and already own a compact booster, or if you need a unit that charges from a standard wall outlet only. Before ordering, confirm your engine displacement fits the 10.0L gas or 8.0L diesel ceiling and that you have a USB-C PD charger on hand for the recharge.
Specifications
| Model | GBX155 |
|---|---|
| Color | Gray |
| Size | 4250A |
Guides from the desk
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