Schumacher
SL1639 Lithium Jump Starter
$75.51
Released 2022
Best Car Jump Starters · head-to-head
SL1639 Lithium Jump Starter vs Alpha 85
A sourced, side-by-side comparison. SL1639 Lithium Jump Starter is cheaper at $75.51. Every spec and price links to its source.
HULKMAN
Alpha 85
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Which is better: the SL1639 Lithium Jump Starter or Alpha 85?
The SL1639 Lithium Jump Starter wins 1 of the 1 specs we compare head to head; the other wins 0.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | SL1639 Lithium Jump Starter | Alpha 85 |
|---|---|---|
| US price | $75.51 | — |
| Brand | Schumacher | HULKMAN |
| Released | 2022 | — |
| Msrp usd | — | — |
| Peak amps | 1000 | 2000 |
| Battery capacity (mAh) | — | 20000 |
| Max gas engine liters | 8 | 8.5 |
| Max diesel engine liters | 6 | 6 |
| Jump starts per charge | 30 | 60 |
| USB c output watts | — | 18 |
| Has air compressor | No | No |
| LED lumens | — | 400 |
| IP rating | — | IP65 |
| Weight (lb) | 1.6 | 2.57 |
| Warranty years | 1 | 2 |
Sources — SL1639 Lithium Jump Starter: schumacherelectric.com (verified 2026-06-23). Alpha 85: hulkman.com (verified 2026-07-10).
What's the difference between the SL1639 Lithium Jump Starter and Alpha 85?
Where the two actually differ on the specs we track (5 of 12). Matching specs are omitted.
- Peak amps: SL1639 Lithium Jump Starter 1000 vs Alpha 85 2000
- Max gas engine liters: SL1639 Lithium Jump Starter 8 vs Alpha 85 8.5
- Jump starts per charge: SL1639 Lithium Jump Starter 30 vs Alpha 85 60
- Weight (lb): SL1639 Lithium Jump Starter 1.6 vs Alpha 85 2.57
- Warranty years: SL1639 Lithium Jump Starter 1 vs Alpha 85 2