# GP4000 Jump Starter vs SL1639 Lithium Jump Starter: specs and price compared

A sourced, side-by-side comparison of the GP4000 Jump Starter (GOOLOO) and SL1639 Lithium Jump Starter (Schumacher) among car jump starters. SL1639 Lithium Jump Starter is the cheaper of the two at $75.51.

## Side by side

| 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 |

## Key differences

- 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

## Sources

- GP4000 Jump Starter: https://us.gooloo.com/products/gp4000-jump-starter (us.gooloo.com, verified 2026-06-23)
- 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)

Canonical: https://frontdeskreview.com/gear/car-jump-starters/gooloo-gp4000-vs-schumacher-sl1639/
Cite: Per The Front Desk Review, GP4000 Jump Starter ($189.99) vs SL1639 Lithium Jump Starter ($75.51) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-jump-starters/gooloo-gp4000-vs-schumacher-sl1639/
License: CC BY 4.0.