NOCO GB70 Vs Hulkman Alpha85: Which Jumper Is Best?
The NOCO GB70 offers tougher build quality, while the Hulkman Alpha85 adds more battery capacity and faster device charging.
Choosing between the NOCO GB70 vs Hulkman Alpha85 comes down to more than peak amps. Both are powerful 12-volt jump starters, but they differ in battery size, charging features, portability, weather protection, and long-term confidence. This guide compares their real strengths, limits, specifications, and best uses so you can buy the right emergency starter for your car, truck, SUV, boat, or work vehicle.
NOCO GB70 vs Hulkman Alpha85: Quick Comparison
The NOCO GB70 and Hulkman Alpha85 are portable lithium jump starters made for dead or weak vehicle batteries. Both models provide up to 2,000 peak amps and support large gas engines and many diesel engines.
| Feature | NOCO GB70 | Hulkman Alpha85 |
|---|---|---|
| Peak current | 2,000 amps | 2,000 amps |
| Gas engine rating | Up to 8.0 liters | Up to 8.5 liters |
| Diesel engine rating | Up to 6.0 liters | Up to 6.0 liters |
| Battery capacity | About 56 watt-hours | About 85 watt-hours |
| USB-C charging | Basic charging support | Up to 60-watt USB-C output |
| 12-volt output | Yes | Yes |
| Safety protection | Reverse polarity, spark, overcharge, and more | Reverse polarity, over-current, short circuit, and more |
| Weather protection | IP65-rated housing | Water-resistant design |
| Weight | About 5 pounds | About 4.7 pounds |
| Best for | Durability and trusted service support | Larger battery and modern charging |
| Typical price | Usually higher | Often more affordable |
Specifications can vary slightly by region, package, or product revision. Always check the exact model label before ordering accessories or replacement cables.
The biggest point is simple: the peak amp number is the same, but the internal battery capacity is not. The Alpha85 stores more energy, while the GB70 has a long-standing reputation for rugged construction and dependable jump-start performance.
NOCO GB70 vs Hulkman Alpha85: Key Differences
Starting power
Both units list a 2,000-amp peak output. That makes them suitable for many cars, pickup trucks, SUVs, vans, and some larger engines.
However, peak amps are not the same as sustained starting power. Peak current is a short burst. The actual result depends on:
• Battery condition
• Engine size and compression
• Oil thickness
• Outside temperature
• Cable quality
• How long the vehicle has been sitting
• Whether the clamps make clean contact
The NOCO GB70 is rated for gas engines up to 8.0 liters and diesel engines up to 6.0 liters. The Hulkman Alpha85 is commonly rated for gas engines up to 8.5 liters and diesel engines up to 6.0 liters.
That small gas-engine difference should not decide the purchase by itself. A healthy 6.0-liter engine may start more easily than a neglected 4.0-liter engine with corroded terminals.
Battery capacity
This is where the Hulkman Alpha85 has a clear advantage on paper. Its battery is about 85 watt-hours, while the NOCO GB70 is about 56 watt-hours.
A larger battery can provide:
• More jump-start attempts
• Longer use between charges
• More phone and tablet charging
• Better support during repeated roadside calls
The GB70 can still deliver many starts from one charge under normal conditions. NOCO states that it can provide up to 40 jump starts, though the exact number depends on the vehicle, battery health, temperature, and charging level.
In daily use, the Alpha85 is more like a larger power bank with jump-start ability. The GB70 is more like a tough jump starter that also works as a power bank.
Charging options
The Alpha85 is the stronger choice for modern electronics. Its USB-C port can support high-speed charging, with output commonly listed at up to 60 watts. That can help charge compatible phones, tablets, cameras, handheld game systems, and some small laptops.
The GB70 includes USB charging and a 12-volt output, but its charging design is less focused on high-power USB-C use. It is built first for vehicle emergencies.
This difference matters if you travel often. During a long road trip, the Alpha85 can act as a larger backup battery for your devices. If you mainly want a reliable tool for a dead car battery, the GB70’s simpler layout may be enough.
Size and weight
The Hulkman Alpha85 is slightly lighter than the GB70, despite having a larger listed battery. That gives it an appealing balance for people who keep a jump starter in a small trunk compartment.
The GB70 is compact, but it feels dense and solid. Its thick housing and heavy-duty cables make it more noticeable in a backpack or glove box.
A practical mistake is storing either unit where it can slide around. A jump starter should stay dry and secure. A loose unit can become damaged by heat, tools, or sharp cargo during normal driving.
Build quality and weather protection
The NOCO GB70 has an IP65-rated housing. This means it is protected from dust and low-pressure water spray. It is not designed for full submersion.
The Alpha85 also has a rugged, water-resistant design and safety protection. Still, resistance to splashes does not mean you should leave it outside in heavy rain or store it in a wet truck bed.
In my view, this is one of the strongest reasons to choose the GB70. Its design feels aimed at workshops, service vehicles, and repeated roadside use. The Alpha85 feels aimed at drivers who want high capacity and extra charging convenience.
NOCO GB70 vs Hulkman Alpha85 Specifications Explained
What peak amps really mean
Peak amps describe the maximum current a jump starter may deliver for a very short period. They are useful for showing general power class, but they do not tell the full story.
A better comparison includes battery capacity, cable thickness, clamp quality, protection circuits, operating temperature, and the maker’s engine-size rating.
Think of peak amps as the size of a door. A wide door helps, but the room behind it still matters. Battery capacity and circuit design help determine how long the unit can support a difficult start.
Engine compatibility
The NOCO GB70 is designed for:
• Passenger cars
• Pickup trucks
• SUVs
• Motorcycles
• Boats
• Recreational vehicles
• Gas engines up to 8.0 liters
• Diesel engines up to 6.0 liters
The Hulkman Alpha85 is designed for similar vehicles and is often listed for gas engines up to 8.5 liters and diesel engines up to 6.0 liters.
These ratings are guidelines, not guarantees. Very cold weather, a seized engine, damaged cables, or a battery with an internal short can prevent a start even when the engine is within the stated size range.
For engines larger than the published rating, use a commercial jump pack or a heavy-duty vehicle support system. Do not assume that a higher peak number makes a consumer jump starter suitable for every diesel truck.
Safety systems
Both products include protections intended to reduce common user errors. These usually include:
• Reverse-polarity protection
• Spark-resistant connection design
• Short-circuit protection
• Over-current protection
• Overcharge protection
• Thermal protection
The NOCO GB70 is known for its mistake-resistant connection system. This is valuable when you are tired, cold, or working beside a dark road.
Even with automatic protection, connect the clamps carefully. Red goes to positive. Black normally goes to the negative terminal or an approved vehicle ground. Follow the manual for vehicles with unusual battery layouts or battery-management systems.
Operating temperature
Lithium batteries lose performance in cold weather. A fully charged pack may still work in winter, but it may not deliver the same strength at 0°F as it does at 70°F.
Store the unit inside the passenger cabin when possible. Do not leave it in a hot vehicle for months, either. Extreme heat can reduce battery life, while extreme cold can temporarily reduce output.
This is a common lesson in roadside work: storage matters almost as much as the jump starter itself. A premium unit that has been left at 0% charge in a freezing trunk may fail when you need it.
Which One Is Easier to Use?
The NOCO GB70 has a simple control layout with clear buttons, indicator lights, and a built-in flashlight. Its clamp cable connects to a dedicated port, which helps keep the design organized.
The Hulkman Alpha85 also uses simple controls and includes a display or indicator system that shows charging and operating information, depending on the version. Its modern screen can be easier to read than a group of small lights.
Both units are beginner-friendly, but the steps still matter:
- Turn off the vehicle and all accessories.
- Check that the jump starter has enough charge.
- Connect the red clamp to the positive battery terminal.
- Connect the black clamp to the negative terminal or a suitable ground.
- Turn on the jump starter if required.
- Start the vehicle for only a few seconds.
- Disconnect the clamps in the correct order.
- Recharge the jump starter after use.
Do not keep cranking for a long time. If the engine does not start after a short attempt, wait and inspect the connections. Repeated long cranks can heat the cables and stress the vehicle starter.
The GB70 has a slight advantage for first-time users because its controls and safety system have been refined over many product generations. The Alpha85 may appeal more to users who prefer a digital display and USB-C charging.
Real-World Performance: NOCO GB70 vs Hulkman Alpha85
A jump starter is most useful when the vehicle battery is weak but still connected to the vehicle. Neither unit can repair a failed alternator, damaged starter motor, blown fuse, or broken battery cable.
In a normal roadside situation, both can start a healthy four-cylinder, six-cylinder, or many V8 engines. The Alpha85’s larger battery may be more useful if you need several attempts or must charge other devices. The GB70’s rugged case and reliable clamp system may be more valuable for repeated vehicle work.
For a rarely used emergency pack, recharge both models every few months. Lithium jump starters slowly lose charge while stored. A simple reminder on your calendar can prevent a frustrating surprise.
I also recommend testing the flashlight, charging port, and clamp connection before storing the unit. Finding a damaged cable in your driveway is much better than finding it on a dark highway shoulder.
Cold-weather use
Cold weather is hard on both the vehicle battery and the jump starter. Before connecting the pack:
• Switch off the headlights and climate controls.
• Brush ice and dirt away from the battery terminals.
• Make sure the clamps have firm metal contact.
• Let the jump starter warm indoors before use when possible.
• Avoid forcing a start if the engine oil is extremely thick.
The Alpha85’s larger battery may give it an advantage during repeated attempts, but it is not immune to cold-weather losses. The GB70 may perform well in winter when fully charged and stored correctly.
Deeply discharged batteries
Some batteries are so empty that an automatic jump starter does not detect them. The GB70 includes a manual override feature for certain low-voltage situations. This can help when the battery voltage is extremely low, but it removes some automatic safety protection.
Use manual override only when you understand the connections and the vehicle battery is installed correctly. Never use it on a damaged, leaking, frozen, or visibly swollen battery.
The Alpha85 may also support special low-voltage operation depending on the model version. Check its manual before relying on this feature.
NOCO GB70 vs Hulkman Alpha85: Pros and Cons
NOCO GB70 advantages
• Strong reputation for durable construction
• Reliable 2,000-amp jump-start class
• IP65-rated housing
• Clear safety features
• Manual override for some deeply discharged batteries
• Suitable for large gas and diesel engines
• Helpful for workshops and frequent vehicle use
NOCO GB70 limitations
• Larger and heavier than some newer designs
• Smaller battery capacity than the Alpha85
• Less impressive USB-C charging performance
• Often costs more
• Requires regular charging during long storage
Hulkman Alpha85 advantages
• Larger 85-watt-hour battery
• Up to 2,000 amps of peak current
• High gas-engine rating
• Strong USB-C charging performance
• Slightly lighter design
• Useful display and modern charging layout
• Often offers strong value for the price
Hulkman Alpha85 limitations
• Product features can vary between Alpha85 versions
• Long-term service support may depend on the seller and region
• Water resistance does not equal waterproofing
• Peak current does not guarantee better starting in every vehicle
• Some users may find the display and ports less useful than rugged simplicity
Which Jump Starter Should You Buy?
Choose the NOCO GB70 if:
• You want a proven, rugged unit for long-term vehicle storage.
• You work on several cars, trucks, boats, or recreational vehicles.
• You value strong safety features and a durable case.
• You prefer a trusted, simple design over extra charging power.
• You need support for a deeply discharged battery in some situations.
Choose the Hulkman Alpha85 if:
• You want the largest battery capacity between the two.
• You often charge phones, tablets, cameras, or other USB-C devices.
• You prefer a lighter unit with a modern display.
• You want a high-power jump starter at a lower typical price.
• You may need several starting attempts during travel or winter use.
For most family cars, either model is powerful enough. The final decision should come from how you will use it, not just the number printed on the box.
If the jump starter will live in a service truck, the NOCO GB70 is the safer long-term pick. If it will live in a travel bag and double as a large power bank, the Hulkman Alpha85 is more attractive.
Buying and Maintenance Tips
A good jump starter only works when it is ready. Follow these simple habits:
• Charge it fully before placing it in your vehicle.
• Recharge it at least every three to six months.
• Keep it away from standing water.
• Avoid storing it in extreme heat for long periods.
• Inspect the clamps and cable for cuts or loose parts.
• Keep the charging cable with the unit.
• Do not use a damaged or swollen lithium battery.
• Read the manual for your exact model and vehicle.
Do not buy based only on peak amps. Look at battery capacity, engine rating, safety design, charging ports, weight, warranty, and seller support.
Also confirm that the package includes the correct wall or USB charger. Some bundles differ by retailer, and a missing charger can delay your first full charge.
A jump starter is not a substitute for battery maintenance. If your vehicle needs frequent boosts, have the battery, alternator, starter, and charging system tested. Repeated jump starts often point to a larger electrical problem.
Frequently Asked Questions About NOCO GB70 vs Hulkman Alpha85
Is the NOCO GB70 better than the Hulkman Alpha85?
The NOCO GB70 is better for rugged use, trusted safety features, and long-term vehicle support. The Hulkman Alpha85 is better if you want more battery capacity, lighter weight, and faster USB-C charging.
Can both jump starters start a diesel engine?
Yes, both are commonly rated for diesel engines up to 6.0 liters. Actual performance depends on battery condition, temperature, engine health, and clean clamp contact.
Which has the larger battery, the NOCO GB70 or Hulkman Alpha85?
The Hulkman Alpha85 has the larger battery at about 85 watt-hours. The NOCO GB70 has about 56 watt-hours, but its capacity is still enough for many emergency starts when fully charged.
Can the Hulkman Alpha85 charge a laptop?
The Alpha85’s USB-C output can support some compatible laptops, especially models with modest power needs. Check your laptop’s required wattage and the exact Alpha85 version before relying on it.
How many times can the NOCO GB70 jump-start a car?
NOCO lists up to 40 starts under suitable conditions. The real number varies with engine size, temperature, battery condition, and how long the engine is cranked.
Are these jump starters safe for modern cars?
Yes, both are designed for 12-volt vehicles and include safety protections. Always follow the vehicle and jump starter manuals, especially for hybrid vehicles, vehicles with remote battery terminals, and cars with sensitive electronic systems.
Can I leave either jump starter in my car?
You can store either unit in a vehicle, but avoid extreme heat and cold when possible. Recharge it every few months and keep it protected from moisture, impact, and loose metal objects.
Conclusion
The NOCO GB70 vs Hulkman Alpha85 comparison reveals two strong but different choices. The GB70 focuses on durable construction, dependable jump-start use, and a proven safety design. The Alpha85 offers a larger battery, lighter handling, and better USB-C charging for modern travel.
Choose the NOCO GB70 for workshop duty, harsh roadside use, and long-term confidence. Choose the Hulkman Alpha85 for greater battery capacity, device charging, and value. Whichever model you select, keep it charged, store it carefully, and test it before an emergency happens. Share your experience or explore more vehicle-care guides to make your next roadside decision easier.
