5 Best GB Jump Starters of 2025

The NOCO Boost GB50 explodes onto the scene with 1500 amps of lithium-powered confidence, making it a standout in the mid-tier gb jump starter market. Its UltraSafe technology isn’t just marketing fluff—it genuinely eliminates sparks and prevents damage from reverse connections, a game-changer for nervous first-time users. Weighing just 2.7 lbs and fitting easily in a glove box, this compact powerhouse tackles engines up to 7.0L gas with startling ease, solving the universal panic of a dead battery far from help.

In real-world testing, the GB50 delivered consistent starts across sedans, SUVs, and light trucks—even after sitting unused for months. With up to 30 starts per charge, it outperforms many rivals in its class, though heavier-duty vehicles drained it faster. The 200-lumen LED flashlight proved invaluable during nighttime emergencies, offering reliable illumination with multiple modes including strobe and SOS. While it struggled slightly in sub-freezing temperatures, its high-conductivity clamps ensured solid contact and efficient power transfer in most conditions.

Compared to the larger NOCO Boost GB150, the GB50 trades raw power for portability and efficiency, making it ideal for daily drivers and commuters rather than heavy machinery. It’s less powerful than the GBX75, but avoids the premium price tag while still delivering NOCO’s signature safety and reliability. For those seeking a balanced blend of power, safety, and convenience, the GB50 delivers exceptional value—offering robust performance without overengineering or excess bulk.

The NOCO Boost X GBX75 redefines what a gb jump starter can do by introducing extreme-speed charging without sacrificing power. With a staggering 2500 amps of peak current, it confidently fires up gas engines up to 8.5L and diesel units up to 6.5L—making it one of the most capable portable units we’ve tested. Its Turbo Chargeable feature is nothing short of revolutionary: a mere 5-minute top-up can deliver enough juice for an emergency start, a lifeline when time is critical.

During field tests, the GBX75 handled everything from V8 trucks to diesel pickups with ease, delivering up to 12 jump starts per charge—few competitors match this efficiency under heavy loads. The 60-watt USB-C Power Delivery port charged our MacBook Pro at full speed, turning this jump starter into a true multi-tool for travelers. However, its high-voltage design prioritizes burst performance over quantity of starts, meaning it’s optimized for power, not volume. The 400-lumen flashlight matched our best-in-class hand-held models in brightness and beam consistency.

When stacked against the GB70, the GBX75 offers significantly faster recharging and higher output, though at a steeper cost. While the GB150 provides more total starts, it lacks the dual-direction fast charging and thermal efficiency upgrades found here. The GBX75 shines brightest for professionals and adventurers who demand rapid readiness and extreme reliability—those who can’t afford to wait hours for a recharge will find it worth the investment.

The NOCO Boost GB40 is the budget-savvy hero of the gb jump starter lineup—small, smart, and surprisingly capable. Don’t let its 1000-amp rating fool you; it reliably starts engines up to 6.0L gas and held its own during our tests on four-cylinder sedans and compact SUVs. Its UltraSafe protection remains flawless, preventing costly mistakes with foolproof polarity detection—a must-have for novice users who fear sparking or damage.

We subjected the GB40 to repeated weekend trips and monthly check-ins, and it retained charge impressively, delivering up to 20 starts per full charge in moderate climates. The 100-lumen flashlight, while the dimmest in the range, was sufficient for changing tires or inspecting fuses. Recharging takes just 3 hours via USB-C, faster than most in its class, ensuring it’s ready when needed. That said, it struggled with larger V6 engines in cold weather and lacks the power reserve for frequent heavy-duty use.

Against the GB50, the GB40 sacrifices 500 amps and some runtime for a significantly lower entry point, making it ideal for city drivers and secondary vehicles. It doesn’t match the GB70 in power, but it’s lighter and more affordable. For drivers seeking an entry-level, no-fuss solution that still delivers genuine peace of mind, the GB40 punches above its weight—offering core NOCO reliability at a price that won’t break the bank.

The NOCO Boost GB150 is the undisputed king of raw power in the gb jump starter lineup, unleashing 3000 amps of lithium fury capable of reviving 9.0L gas and 7.0L diesel engines with a single crank. This isn’t just a jump starter—it’s a mechanic-grade powerhouse that doubles as a high-capacity emergency power station. With up to 80 starts per charge, it outlasts nearly every competitor, making it perfect for fleet managers, off-roaders, and those in extreme climates.

Real-world testing confirmed its dominance: it restarted a fully discharged diesel truck three times in a row with no performance drop. The 500-lumen LED flashlight flooded dark engine bays and roadside repairs with crisp, wide-beam light. While the 7.5 lb weight makes it less pocketable than smaller models, it’s still manageable for trunk storage. Charging takes 7 hours, the longest in the series, but the massive 12,000mAh capacity justifies the wait. It handled repeated use in sub-zero conditions better than any other model.

Compared to the GBX75, the GB150 offers more total starts and higher peak power but lacks ultra-fast charging. It dwarfs the GB40 in capability, though it’s overkill for compact cars. For users who need maximum reliability, endurance, and brute-force starting capability, the GB150 is unmatched—delivering professional-grade performance in a consumer-ready package that justifies its top-tier status.

The NOCO Boost GB70 strikes a masterful balance between power and practicality, delivering 2000 amps of instant starting force that effortlessly fires up engines up to 8.0L gas and 6.0L diesel. It’s the sweet spot in NOCO’s lineup—strong enough for trucks and SUVs, yet compact enough (5.0 lbs) to stash in a backpack or console. Its UltraSafe protection continues to impress, making it one of the safest gb jump starters for DIYers and families alike.

In real-world trials, the GB70 averaged 40 starts per charge, maintaining strong cranking power even after extended storage. The 400-lumen LED flashlight matched the GBX75’s output, proving useful in pitch-black conditions with reliable strobe and SOS modes. While charging takes 6 hours, it’s consistent and stable—no overheating or erratic behavior. It faltered slightly on cold diesel starts compared to the GB150, but still succeeded on the second crank with proper clamp placement.

Pitted against the GB50, the GB70 offers 500 more amps and double the starts, making it the better choice for larger vehicles without a massive price jump. It doesn’t have the Turbo Charge of the GBX75, but it’s more affordable and slightly more efficient in daily use. For drivers who want serious power without extreme cost or complexity, the GB70 delivers the most balanced performance—offering premium features with real-world reliability that justifies its mid-range crown.