NOCO
NOCO Boost Plus GB40
$99.95
Released 2023
Best Car Jump Starters · head-to-head
NOCO Boost Plus GB40 vs Schumacher SL1639 Lithium Jump Starter
A sourced, side-by-side comparison. Schumacher SL1639 Lithium Jump Starter is cheaper at $75.51. Every spec and price links to its source.
Schumacher
Schumacher SL1639 Lithium Jump Starter
$75.51Cheaper
Released 2022
Which is better: the NOCO Boost Plus GB40 or Schumacher SL1639 Lithium Jump Starter?
The Schumacher SL1639 Lithium Jump Starter wins 1 of the 1 specs we compare head to head; the other wins 0. The Schumacher SL1639 Lithium Jump Starter is the cheaper at $75.51. The Schumacher 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 | NOCO Boost Plus GB40 | Schumacher 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 |
Sources — NOCO Boost Plus GB40: no.co (verified 2026-06-23). Schumacher SL1639 Lithium Jump Starter: schumacherelectric.com (verified 2026-06-23).
What's the difference between the NOCO Boost Plus GB40 and Schumacher SL1639 Lithium Jump Starter?
Where the two actually differ on the specs we track (4 of 12). Matching specs are omitted.
- Max gas engine liters: NOCO Boost Plus GB40 6 vs Schumacher SL1639 Lithium Jump Starter 8
- Max diesel engine liters: NOCO Boost Plus GB40 3 vs Schumacher SL1639 Lithium Jump Starter 6
- Jump starts per charge: NOCO Boost Plus GB40 20 vs Schumacher SL1639 Lithium Jump Starter 30
- Weight (lb): NOCO Boost Plus GB40 2.45 vs Schumacher SL1639 Lithium Jump Starter 1.6