Clore Automotive JNC660 vs HULKMAN Alpha85S
Clore Automotive JNC660
HULKMAN Alpha85S
The short answer
Clore Automotive JNC660 and HULKMAN Alpha85S finish almost level in our scoring (6.6 vs 6.5 out of 10), so the right pick depends on what you value most. Clore Automotive JNC660 is stronger on starting power, build quality & durability, battery safety & sustainability and value. HULKMAN Alpha85S is stronger on battery capacity & standby, ease of use & safety features and versatility. At current verified prices, the Clore Automotive JNC660 costs about $173.97 less.
- Choose the Clore Automotive JNC660 if: Farms, shops and fleets that need long, repeated glow-plug cranks and can keep an 18 lb box on AC charge.
- 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.
Scores by criterion
| Criterion | Clore Automotive JNC660 | HULKMAN Alpha85S |
|---|---|---|
| Starting Power | 8.0425 cranking amps of sustained current; Outdoor Life says up to a 350 diesel; spec-based | 6.52,000A; failed AutoGuide's 6.5L diesel test after two cranks; fine for gas (TechGearLab) |
| Battery Capacity & Standby | 5.022Ah SLA; recharge after each jump | 7.074 Wh unmeasured; -40°F floor is claim-only |
| Ease of Use & Safety Features | 6.5Simple with long heavy cables, but 18 lb and AC-charge only | 7.5Pre-heat and READY indicator are claimed features; 3.3-inch display |
| Build Quality & Durability | 8.0Pro-grade shop box with a replaceable battery | 7.0IP65 and 2-year guarantee; overheated in AutoGuide's testing |
| Versatility | 3.0No USB, light or compressor | 6.565W USB-C; no compressor |
| Battery Safety & Sustainability | 6.5Lead-acid is recyclable and the battery is replaceable, but it contains lead | 6.0Li-polymer; no UL certification stated |
| Value | 7.0$126 is fair for a pro shop box | 5.0$300 for a 2,000A pack |
Specifications
| Spec | Clore Automotive JNC660 | HULKMAN Alpha85S |
|---|---|---|
| Peak Current | 1,700 A | 2,000 A |
| Max Gas Engine (rated) | — | 8.5 L |
| Max Diesel Engine (rated) | — | 6 L |
| Battery Chemistry | Sealed lead-acid (AGM) | Lithium polymer |
| Rated Capacity | — | 74 Wh |
| Weight | 18 lb | 3.6 lb |
| Built-in Air Compressor | No | No |
| Max USB Output | — | 65 W |
| Water/Dust Rating | — | IP65 |
| Min Operating Temperature (rated) | — | -40 °F |
| Automatic Cell Preheat for Extreme Cold | No | Yes |
Clore Automotive JNC660
Pros
- Sustained cranking current for hard starts
- Heavy 46-inch #2 AWG cables
- Replaceable battery
- Built-in automatic charger
- Moderate price
Cons
- 18 lb and not portable
- Charges only from 120V AC
- Must be recharged after each jump
- No USB or light
The practical choice for shops, farms and fleets with diesels that need repeated cranks and a place to plug in.
Full Clore Automotive JNC660 review →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 →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.