HULKMAN Alpha85S vs NOCO GBX155
HULKMAN Alpha85S
The short answer
NOCO GBX155 comes out ahead overall with 7.8/10 against 6.5/10 for the HULKMAN Alpha85S. HULKMAN Alpha85S is stronger on ease of use & safety features. NOCO GBX155 is stronger on starting power, battery capacity & standby, build quality & durability, versatility and value. At current verified prices, the HULKMAN Alpha85S costs about $69.96 less.
- Choose the HULKMAN Alpha85S if: Drivers in sub-zero climates with gas half-ton trucks or SUVs (not HD diesels) who want automatic cell pre-heat.
- Choose the NOCO GBX155 if: Owners of 3/4- and 1-ton diesel pickups or big gas V8s who want the best-tested lithium power and can store the pack somewhere warm.
Scores by criterion
| Criterion | HULKMAN Alpha85S | NOCO GBX155 |
|---|---|---|
| Starting Power | 6.52,000A; failed AutoGuide's 6.5L diesel test after two cranks; fine for gas (TechGearLab) | 9.34250A; best results in TechGearLab's test. |
| Battery Capacity & Standby | 7.074 Wh unmeasured; -40°F floor is claim-only | 9.086.1 Wh measured, the most usable energy in the pool. |
| Ease of Use & Safety Features | 7.5Pre-heat and READY indicator are claimed features; 3.3-inch display | 7.0Buttons and indicators are less clear than rivals' (TechGearLab). |
| Build Quality & Durability | 7.0IP65 and 2-year guarantee; overheated in AutoGuide's testing | 7.5Solid build but 5.8 lb, no case, no IP rating confirmed. |
| Versatility | 6.565W USB-C; no compressor | 7.560W USB-C PD; no compressor. |
| Battery Safety & Sustainability | 6.0Li-polymer; no UL certification stated | 6.0Spark-proof and reverse-polarity protection; 99 Wh; no UL 2743 confirmed. |
| Value | 5.0$300 for a 2,000A pack | 5.5About $370, roughly 3x the MV24's price. |
Specifications
| Spec | HULKMAN Alpha85S | NOCO GBX155 |
|---|---|---|
| Peak Current | 2,000 A | 4,250 A |
| Max Gas Engine (rated) | 8.5 L | 10 L |
| Max Diesel Engine (rated) | 6 L | 8 L |
| Battery Chemistry | Lithium polymer | Lithium-ion |
| Rated Capacity | 74 Wh | 99 Wh |
| Measured Usable Capacity (TechGearLab) | — | 86.1 Wh |
| Weight | 3.6 lb | 5.8 lb |
| Built-in Air Compressor | No | No |
| Max USB Output | 65 W | 60 W |
| Water/Dust Rating | IP65 | IP65 (ports closed) |
| Min Operating Temperature (rated) | -40 °F | -4 °F |
| Automatic Cell Preheat for Extreme Cold | Yes | No |
HULKMAN Alpha85S
Pros
- Automatic cell pre-heat
- TechGearLab scored it 80 on gas vehicles
- 3.6 lb and IP65
- 65W USB output
Cons
- Failed to start a 6.5L diesel in AutoGuide's test
- Cold rating untested independently
- Expensive
- No carrying case
- Engine ratings differ between listings
A niche pick for gas half-tons and SUVs in very cold places. Diesel owners should choose the NOCO, WOLFBOX or Clore.
Full HULKMAN Alpha85S review →NOCO GBX155
Pros
- Highest-scoring unit in TechGearLab's test
- Rated for 10L gas and 8L diesel
- 86.1 Wh measured usable battery
- Spark-proof and reverse-polarity protection
- Sold directly by Amazon
Cons
- Premium price
- Heavy at 5.8 lb, with no storage case
- Buttons and indicators are less clear than rivals'
- No air compressor
The pick for owners of large diesels and fleet vehicles who value proven power over price. Most drivers get more for their money elsewhere.
Full NOCO GBX155 review →Both products are part of our guide The Best Jump Starters for Cold Weather & Diesel Trucks of 2026, where you can see every pick, how we score and current prices from each retailer.