A dead battery on a dark morning is the moment a battery jumper pack earns its place in the trunk. The HULKMAN Alpha85 is a 2000A lithium jump starter built for that moment: rated for gas engines up to 8.5L and diesels up to 6.0L, with a 74Wh battery and a 3.3-inch display that shows charge and fault status instead of leaving you to guess from blinking LEDs. It is also a power bank and a 12V power source, so it keeps working after the engine is running.
In this review of the HULKMAN Alpha85 battery jumper pack, we cover what the 2000A rating actually covers, how the display and the fast recharge work, what the safety protections do, and how it compares with the NOCO GB40 and GB70 — the two jump starters most buyers shortlist next to it. The Quick Pick table below has the short version first.
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| Pick | Product | Why it stands out | Check Price |
|---|---|---|---|
| Overall Winner | HULKMAN Alpha85 Jump Starter | 2000A peak, gas to 8.5L / diesel to 6.0L, 3.3-inch display, 65W fast recharge | |
| Best Budget | NOCO Boost GB40 Jump Starter | 1000A peak, enough for most cars and small SUVs, much lighter at 1.65 lbs | |
| Premium Pick | NOCO Boost GB70 Jump Starter | 2000A peak, gas to 8.0L / diesel to 6.0L, 56Wh battery, 400-lumen flashlight |
Table of Contents
What the HULKMAN Alpha85 Battery Jumper Pack Is — and What It Is Not
The Alpha85 is a self-contained unit: a 74Wh lithium battery in a rugged housing, intelligent booster clamps, a 3.3-inch smart display, a 5-mode LED flashlight, and USB-A, USB-C and 12V DC outputs. Charge it at home, carry it in the trunk, and when the battery dies connect the clamps and start the engine — no second vehicle, no waiting for roadside assistance, no asking a stranger for a jump. In short, it is a battery jump start portable unit: everything you need for a jump lives in the one box.
It measures 9.06 by 4.06 by 1.82 inches and weighs about 4.5 lbs, with a 27.5-inch clamp cable — a toolbox item rather than a glovebox item. In the box are the Alpha85 unit, a 65W wall charger, rubber-wrapped booster clamps, a Type-C USB cable, and a DC 12V cigarette-lighter socket adapter. It comes in Space Gray, Cobalt Blue and Midnight Green, and the user manual describes a 2-year guarantee.
Just as important is what the Alpha85 is not. It is not a battery charger, and it will not fix a battery that is worn out or damaged — it gives a dead-but-healthy battery the surge it needs to turn the engine over. It is not a maintainer for a stored car, and it is built for 12V vehicle batteries. The display shows the pack’s own charge and fault status, not the health of your car’s battery, so a battery that dies more than once still needs testing.
Power and Engine Fit: 2000A for Gas up to 8.5L and Diesel up to 6.0L
Peak current is the number that decides whether a jump starter can crank your engine, and the Alpha85’s headline figure is 2000A. HULKMAN rates it for gas engines up to 8.5L and diesel engines up to 6.0L — most cars, crossovers and SUVs, most half-ton pickups with gas V8s, and the light-duty diesels found in half-ton pickups. HULKMAN rates it for up to 60 jump starts on a single charge: treat that as a maximum under favourable conditions, not a promise — the real number depends on engine size and how drained the battery is.
The engine-displacement ratings are the more practical comparison point. Peak-amp claims vary between brands and are not measured to a single common standard, so treat cross-brand amp comparisons as rough. The displacement rating tells you directly what the unit is designed to start. Match the rating to your engine before you buy: an undersized jump starter is the most common reason a jump fails.
What the Alpha85 does not cover is anything above its ratings: a big diesel work truck over 6.0L, or a gas engine over 8.5L, needs a bigger unit. If your engine sits close to the limit, step up rather than hope the rating has slack in it.
The 3.3-Inch Display and 65W Fast Recharge
The display is the feature that sets the Alpha85 apart from most jump starters at this level. The 3.3-inch smart screen shows the charge percentage, error codes and product status, so you can see at a glance whether the pack is ready and, if something is wrong, what the problem is — a wrong connection or a low charge — instead of guessing from a row of blinking LEDs. At 6 a.m. in the dark, that difference matters.
Recharging is fast for a pack this size. With the included 65W wall charger, HULKMAN’s 65W Speed Charge takes the Alpha85 from empty to 80 percent in about an hour and to a full charge in about 1.5 hours. A 5-minute charge is enough for a single jump start, according to the listing. When fully charged it holds its charge for up to 18 months, according to the listing — still check the display before winter and before any trip where you may need it.
One honest note: the 1.5-hour figure is with the included 65W wall charger. Charge the Alpha85 from a lower-powered source and it will take longer, so keep the 65W charger where you charge the pack.
Safety, Force Start, and Completely Dead Batteries
Jump-starting involves real current, so the safety design of a battery jumper pack matters as much as the amps. The Alpha85 lists 10 types of protection, including spark-proof connections, reverse-polarity protection and short-circuit protection, and its booster clamps are built in, fully insulated and designed to produce no spark. As a jumper pack, the Alpha85 replaces a set of portable jumper cables and a second car — and the protections are what make that safe for a driver who jumps a vehicle once a year rather than once a week.
The steps are the standard ones: red to the positive terminal first, then black to an unpainted metal ground point on the engine block or chassis, away from the battery; start the vehicle; disconnect promptly once it is running, black first, then red. Never let the clamps touch each other, and work in a ventilated area, since charging batteries can vent hydrogen gas.
The Force Start function covers the worst case: a battery so completely dead that the pack cannot detect any voltage to work with. In that situation the Alpha85 can be forced to deliver current anyway, so a fully drained battery is still jumpable. Use it only as the manual describes, and never try to jump a battery that is visibly cracked, leaking or frozen — a damaged battery can be dangerous, and no jump starter makes it safe.
Power Bank and 12V Output: What It Charges After the Jump
Once the engine is running, the Alpha85 keeps earning its space in the trunk. The 74Wh battery works as a portable power bank: a USB-A port with QC3.0, a USB-C port with 18W PD output, and a 12V/10A DC output. That covers phones and tablets, and the 12V output can run a tire pump, a car refrigerator and other 12V accessories, according to the listing. Jump-starting a car uses only a small share of the capacity, which is why the up-to-60-starts rating is plausible on paper.
Read the charging numbers carefully, because two different figures circulate. The 65W figure is about recharging the Alpha85 itself, through the included wall charger. The listing puts the USB-C output at 18W PD, so do not buy this as a fast laptop charger: it will top up phones and tablets, but a laptop is a different job. The 5-mode LED flashlight is the other after-the-jump feature — enough light to work under a hood in the dark.
HULKMAN Alpha85 vs the Alternatives (GB40, GB70)
The obvious comparison is the NOCO Boost GB40, the smaller best-seller. The GB40 delivers 1000A — half the Alpha85’s peak — and is rated for gas engines up to 6.0L and diesels up to 3.0L, with up to 20 starts per charge from a 24Wh battery and a 100-lumen flashlight. It weighs just 1.65 lbs against the Alpha85’s 4.5 lbs, and its housing is rated IP65 with the ports closed. For a sedan or a small SUV, the GB40 is plenty, and it is the lighter, simpler buy. Our full GB40 review covers the smaller unit on its own.
The NOCO Boost GB70 is the closer rival on paper: the same 2000A peak, rated for gas engines up to 8.0L and diesels up to 6.0L, with up to 40 starts per charge from a 56Wh battery, a 400-lumen flashlight and a 1-year warranty. Against it, the Alpha85 counters with a slightly higher gas rating (8.5L against 8.0L), a larger 74Wh battery, an up-to-60-starts rating against 40, the 3.3-inch display the GB70 does not have, and 65W fast recharging. The GB70 counters with NOCO’s established track record and an IP65-rated housing. Our GB70 review walks through the bigger NOCO on its own.
A third option for drivers who want one device that both jumps and inflates: the WOLFBOX MV24A, a 4000A jump starter combined with a 160 PSI air compressor. It offers twice the Alpha85’s peak current and adds built-in inflation, which the Alpha85 can only do by powering a separate inflator through its 12V output. If a built-in compressor matters more than the Alpha85’s display and fast recharge, the WOLFBOX combo is the more complete roadside kit. Our WOLFBOX MV24A review covers it in full.
Who Should Buy It — and Who Should Skip It
Buy the Alpha85 if you drive a larger gas engine or a light-duty diesel within its 8.5L gas and 6.0L diesel ratings, or if you want one unit for the whole driveway — car, SUV and pickup. It also suits drivers who value the display: if you jump a car rarely and want the pack to tell you what is wrong instead of blinking at you, the 3.3-inch screen is the reason to pick this unit over the GB70. And it suits anyone who will use the power bank and 12V output between jumps, on road trips or at the campsite.
Skip it if your biggest engine is a four-cylinder sedan — the GB40 covers that for less money and less than half the weight, and the extra 1000A buys you nothing. Skip it too if your engine is above the Alpha85’s ratings, or if a built-in air compressor matters more than a display — the WOLFBOX combo is the better fit there. And skip it if you need a glovebox-sized unit: at 4.5 lbs and over 9 inches long, the Alpha85 is a toolbox item, not a pocket item.
Verdict
The HULKMAN Alpha85 battery jumper pack is the right choice for the driver its ratings describe: gas engines up to 8.5L, diesels up to 6.0L, up to 60 starts per charge, and a 3.3-inch display that tells you what is happening instead of leaving you to guess. The 74Wh battery, 65W fast recharge and useful power-bank outputs make it more than a one-morning tool. Its limits are equally clear: it is heavier and larger than the GB40, it has no built-in air compressor, and its USB-C output is 18W, not 65W. Accept those three facts and this is a strong buy; if any is a deal-breaker, the alternatives above are the honest next step.
Frequently Asked Questions
Can the HULKMAN Alpha85 start a completely dead battery?
Yes. The Alpha85 is rated to start completely dead batteries, and its Force Start function covers the worst case: a battery so drained that the pack cannot detect any voltage to work with. In that situation the Alpha85 can be forced to deliver current anyway, so a fully drained battery is still jumpable. Use Force Start only as the manual describes, and never try to jump a battery that is visibly cracked, leaking or frozen.
What size engines can the Alpha85 jump start?
HULKMAN rates the Alpha85 for gas engines up to 8.5L and diesel engines up to 6.0L, with 2000A of peak current. That covers most cars, crossovers, SUVs, half-ton gas pickups and light-duty diesels. If your engine is larger than those limits, the Alpha85 is not rated for it and you need a bigger unit.
How long does the Alpha85 take to recharge?
With the included 65W wall charger, HULKMAN’s 65W Speed Charge takes the Alpha85 from empty to 80 percent in about an hour and to a full charge in about 1.5 hours. A 5-minute charge is enough for a single jump start, according to the listing. When fully charged, the pack holds its charge for up to 18 months, according to the listing, but check the display before winter and before any trip where you may need it.
Can the Alpha85 charge a phone?
Yes. The Alpha85 works as a portable power bank, with a USB-A port with QC3.0, a USB-C port with 18W PD output, and a 12V/10A DC output that can run a tire pump, a car refrigerator and other 12V accessories. The 65W figure is about recharging the Alpha85 itself, not the USB-C output, so do not buy it as a fast laptop charger.
How many jump starts can the Alpha85 do on one charge?
HULKMAN rates the Alpha85 for up to 60 jump starts on a single charge. The real number depends on the engine size and how drained the battery is, so treat 60 as a maximum under favourable conditions, not a promise — and recharge the unit after you use it.
Should I buy the Alpha85 or the NOCO GB70?
On the spec sheet they are close: both deliver 2000A peak and are rated for diesels up to 6.0L, and both work as power banks with a flashlight. The Alpha85 is rated for gas engines up to 8.5L against the GB70’s 8.0L, has a larger 74Wh battery against 56Wh, is rated for up to 60 starts against 40, and adds the 3.3-inch display and 65W fast recharge. The GB70 counters with NOCO’s established track record, an IP65-rated housing and a 400-lumen flashlight. If the display, the larger battery and the faster recharge matter most, choose the Alpha85; if you want the established NOCO name and the tougher housing, choose the GB70.
