# Boost Plus GB40 vs SL1639 Lithium Jump Starter: specs and price compared

A sourced, side-by-side comparison of the Boost Plus GB40 (NOCO) 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 | Boost Plus GB40 | SL1639 Lithium Jump Starter |
| --- | --- | --- |
| US price | $99.95 | $75.51 |
| Brand | NOCO | Schumacher |
| Released | 2023 | 2022 |
| Msrp usd | 124.95 | — |
| Peak amps | 1000 | 1000 |
| Battery capacity (mAh) | 2150 | — |
| Max gas engine liters | 6 | 8 |
| Max diesel engine liters | 3 | 6 |
| Jump starts per charge | 20 | 30 |
| USB c output watts | — | — |
| Has air compressor | No | No |
| LED lumens | 100 | — |
| IP rating | IP65 | — |
| Weight (lb) | 2.45 | 1.6 |
| Warranty years | 1 | 1 |

## Key differences

- Max gas engine liters: Boost Plus GB40 6 vs SL1639 Lithium Jump Starter 8
- Max diesel engine liters: Boost Plus GB40 3 vs SL1639 Lithium Jump Starter 6
- Jump starts per charge: Boost Plus GB40 20 vs SL1639 Lithium Jump Starter 30
- Weight (lb): Boost Plus GB40 2.45 vs SL1639 Lithium Jump Starter 1.6

## Sources

- Boost Plus GB40: https://no.co/gb40/specs (no.co, 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/noco-boost-plus-gb40-vs-schumacher-sl1639/
Cite: Per The Front Desk Review, Boost Plus GB40 ($99.95) vs SL1639 Lithium Jump Starter ($75.51) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-jump-starters/noco-boost-plus-gb40-vs-schumacher-sl1639/
License: CC BY 4.0.