What to know about HULKMAN Alpha85S
Why it stands out
Why we like it
It is included for gas-truck owners in deep cold and is not a diesel recommendation. AutoGuide's hands-on test found it cranked a 6.5L Silverado HD diesel only twice before overheating, and the engine did not start. Hulkman rates it for only 6.0L diesel.
What to know
Score breakdown
Ability to start a fully dead or deeply discharged battery on the intended engine size, including repeated back-to-back starts and cold-weather performance, as shown in independent tests (TechGearLab 3x rapid-start, Car and Driver dead-battery tests, Outdoor Life V8 tests).
Measured usable energy versus claimed, jumps per charge, standby charge retention and recharge speed.
Clamp quality and size, cable length and gauge, clarity of the display and indicators, spark-proof and reverse-polarity protection, and how easy the boost/override mode is to use.
Construction, water and dust resistance (IP rating), quality of cables and clamps, storage case, and warranty length.
Extra functions such as USB-C PD power bank, 12V DC output, air compressor, work light and alternator check.
Battery chemistry and fire risk, verified safety certification (UL 2743), CPSC recalls or warnings, Prop 65/lead content, replaceable batteries and parts, and end-of-life recyclability.
Performance and features delivered relative to typical street price.
HULKMAN Alpha85S specs
Power
- Peak Current
- 2000 A
- Max Gas Engine (rated)
- 8.5 L
- Max Diesel Engine (rated)
- 6 L
Battery
- Battery Chemistry
- Lithium polymer
- Rated Capacity
- 74 Wh
Physical
- Weight
- 3.6 lb
- Water/Dust Rating
- IP65
Features
- Built-in Air Compressor
- No
- Max USB Output
- 65 W
Cold Weather
- Min Operating Temperature (rated)
- -40 °F
- Automatic Cell Preheat for Extreme Cold
- Yes
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Prices and availability may change. The retailer's price and availability at checkout govern the transaction.
| Retailer | Price | Availability | |
|---|---|---|---|
| AmazonLowest | $299.99 | In Stock | View deal |
Based on 2 retailer price observations captured during the last 90 days.