GOOLOO
GP4000 Jump Starter
$189.99
Released 2023
Best Car Jump Starters · head-to-head
GP4000 Jump Starter vs SL1639 Lithium Jump Starter
A sourced, side-by-side comparison. SL1639 Lithium Jump Starter is cheaper at $75.51. Every spec and price links to its source.
Schumacher
SL1639 Lithium Jump Starter
$75.51Cheaper
Released 2022
Which is better: the GP4000 Jump Starter or SL1639 Lithium Jump Starter?
The SL1639 Lithium Jump Starter wins 1 of the 1 specs we compare head to head; the other wins 0. The SL1639 Lithium Jump Starter is the cheaper at $75.51. The SL1639 Lithium Jump Starter both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | GP4000 Jump Starter | SL1639 Lithium Jump Starter |
|---|---|---|
| US price | $189.99 | $75.51 |
| Brand | GOOLOO | Schumacher |
| Released | 2023 | 2022 |
| Msrp usd | 189.99 | — |
| Peak amps | 4000 | 1000 |
| Battery capacity (mAh) | 24000 | — |
| Max gas engine liters | — | 8 |
| Max diesel engine liters | 10 | 6 |
| Jump starts per charge | 60 | 30 |
| USB c output watts | 15 | — |
| Has air compressor | No | No |
| LED lumens | — | — |
| IP rating | — | — |
| Weight (lb) | 1.81 | 1.6 |
| Warranty years | — | 1 |
Sources — GP4000 Jump Starter: us.gooloo.com (verified 2026-06-23). SL1639 Lithium Jump Starter: schumacherelectric.com (verified 2026-06-23).
What's the difference between the GP4000 Jump Starter and SL1639 Lithium Jump Starter?
Where the two actually differ on the specs we track (4 of 12). Matching specs are omitted.
- Peak amps: GP4000 Jump Starter 4000 vs SL1639 Lithium Jump Starter 1000
- Max diesel engine liters: GP4000 Jump Starter 10 vs SL1639 Lithium Jump Starter 6
- Jump starts per charge: GP4000 Jump Starter 60 vs SL1639 Lithium Jump Starter 30
- Weight (lb): GP4000 Jump Starter 1.81 vs SL1639 Lithium Jump Starter 1.6