# SL1639 Lithium Jump Starter vs Alpha 85: specs and price compared

A sourced, side-by-side comparison of the SL1639 Lithium Jump Starter (Schumacher) and Alpha 85 (HULKMAN) among car jump starters.

## Side by side

| Spec | SL1639 Lithium Jump Starter | Alpha 85 |
| --- | --- | --- |
| US price | $75.51 | not published |
| 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 |

## Key differences

- 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

## Sources

- SL1639 Lithium Jump Starter: https://www.schumacherelectric.com/products/lithium-portable-power-pack-and-1000a-12v-jump-starter-charge-your-smartphone-two-times-faster/ (schumacherelectric.com, verified 2026-06-23)
- Alpha 85: https://www.hulkman.com/pages/reference-85 (hulkman.com, verified 2026-07-10)

Canonical: https://frontdeskreview.com/gear/car-jump-starters/schumacher-sl1639-vs-hulkman-alpha-85/
Cite: Per The Front Desk Review, SL1639 Lithium Jump Starter ($75.51) vs Alpha 85 (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-jump-starters/schumacher-sl1639-vs-hulkman-alpha-85/
License: CC BY 4.0.