Hulkman Alpha 85S
#10 in Trucks and V8sFull review
For drivers in hard-winter states with cars, SUVs or gas pickups up to a V8. The pre-heat is what you pay extra for over the Alpha 85.
Amazon $189.99$189.99
The Hulkman Alpha 85S is the better jump starter overall, rated 3.7 to 2.7. The Hulkman Alpha 85S leads on features and warranty. The Stanley J7C09D costs $6.07 less ($183.92 vs $189.99).
Prices were last checked November 3, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Stanley J7C09D
#31 in Trucks and V8sFull review
For a garage that wants a booster and inflator with a bit more power than the J5C09D. At its current price most buyers get more from a lithium pack or the cheaper J5C09D.
Amazon $183.92$183.92
Which should you buy?
- Choose the Hulkman Alpha 85S for features (manual override, rated to -40 °F, USB-C charging, IP65 vs basic) and warranty (2-year warranty vs 1-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every trucks and v8s jump starter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Hulkman Alpha 85S | Stanley J7C09D |
|---|---|---|
| Overall rating | 3.7/5 | 2.7/5 |
| Value 40% | 32 $189.99 for its size | 35 $183.92 for its size |
| Features 35% | 100 manual override, rated to -40 °F, USB-C charging, IP65 | 35 basic |
| Capacity 15% | 73 74 Wh battery | 50 capacity not published in Wh (neutral score used) |
| Warranty 10% | 50 2-year warranty | 0 1-year warranty |
Specifications
| Hulkman Alpha 85S | Stanley J7C09D | |
|---|---|---|
| Starting | ||
| Rated engines | 8.5 L gas, 6 L diesel | Cars and trucks up to V8 (no liter rating) |
| Peak amps (maker) | 2,000 A | 1,400 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | - |
| Lowest operating temperature | -40 °F | - |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lead-acid (AGM) |
| Capacity | 74 Wh | - |
| USB-C input | 65 W | - |
| Recharge time | 1.5 hours | 40 hours |
| USB outputs | USB-C 18 W, USB-A QC3.0 18 W | 3x USB-A 15 W |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | Yes |
| Water resistance | IP65 | - |
| Dimensions | 9.06 x 4.06 x 1.77 in | 12.7 x 10.8 x 7.4 in |
| Weight | - | 17 lb |
| Warranty | 2 years | 1 year |
| Released | 2020-09 | - |