If you need the widest engine coverage in this pair, get the Boost GB50; if you want a lower-priced 1500A backup for smaller engines, get the S8 in Red. Both advertise 1500 amps peak, but the maker ratings differ: the GB50 is rated up to 7.0L gasoline and 4.5L diesel with up to 30 starts per charge on the Amazon listing, while the S8 is rated up to 6.0L gasoline and 3.0L diesel. The GB50 documents a 35 Wh lithium-ion pack, a 200-lumen LED with 7 modes, IP65 housing and a 1-year warranty on the maker spec page; the S8 documents a 37 Wh high-rate lithium pack, a 3-mode flashlight, 8 integrated protections with metal clamps and a BOOST mode for batteries under 9 V on its Amazon listing.
Choose by your situation
| Situation | Model to consider | Main tradeoff |
|---|---|---|
| You drive a larger gasoline engine or a diesel up to 4.5L and want the stronger documented rating with up to 30 starts per charge | Boost GB50 | Costs substantially more than the S8 at observation ($149.95 vs $44.98 on 09/12/2026); larger and heavier at 2.71 lb. |
| You want a compact backup for a car, SUV, motorcycle or lawnmower with a 6.0L gas / 3.0L diesel ceiling and the lowest price | S8 Red | Lower engine ceiling and less maker documentation on the observed pages; no star rating shown in the observed main block, so judge it on specs and seller terms. |
1500A against 1500A, side by side
| Criterion | Boost GB50 | S8 Red |
|---|---|---|
| Peak current | 1500 amps peak per the maker and the Amazon listing | 1500 amps peak per the Amazon listing |
| Engine ratings | Up to 7.0L gasoline and up to 4.5L diesel | Up to 6.0L gasoline and 3.0L diesel |
| Starts per charge | Up to 30 starts per charge per the Amazon listing | Not published on the observed pages |
| Internal battery | 35 Wh lithium-ion per the maker spec page; 2150 mAh-class cell data on the listing should not be compared to Wh | 37 Wh high-rate lithium (45C) per the Amazon listing; lithium-nickel manganese cobalt chemistry |
| Safety and clamps | Spark-proof and reverse-polarity protection; heavy-duty precision clamps; IP65 housing | 8 integrated protections including reverse polarity, overcurrent, overvoltage, overload, overcharge, over-discharge and short circuit; metal clamps with smart cable; BOOST mode unlocks under 9 V |
| Light and power bank | 200-lumen LED with 7 modes including SOS and strobe; USB-C 5 V 2.1 A input and output per the maker | 3-mode flashlight; portable power-bank function per the listing |
| Size and weight | 8.58 x 4 x 4.75 in (218 x 80.3 x 86.8 mm), 2.71 lb (1.22 kg) per the maker | 7.9 x 4.5 x 3.7 in, 12.64 oz per the listing |
| Box and warranty | GB50 unit, heavy-duty clamps, USB-C cable, microfiber bag; 1-year hassle-free warranty per the maker | Jump starter, smart jumper cable and manuals per the listing pattern; warranty details deferred to the linked warranty page on Amazon |
| Listing reception at observation | 4.6 out of 5 stars across 16,899 ratings, 4K+ bought in the past month | 400+ bought in the past month and 100+ bought in the past week; no star rating shown in the observed main block |
Boost GB50: the wider-coverage pick
The Boost GB50 suits drivers who want headroom: 1500 amps peak aimed at up to 7.0L gasoline and 4.5L diesel engines, with up to 30 starts per charge claimed on the listing. The maker spec page backs it with a 35 Wh pack, USB-C 5 V 2.1 A in and out, a 200-lumen LED with 7 modes, IP65 dust and water resistance and a 1-year warranty, in a 2.71 lb body with heavy-duty precision clamps. Its limits are price and bulk: at $149.95 in the observed This-item line it costs more than three times the S8, and it takes more glovebox space. The Amazon US listing carried 4.6 out of 5 stars across 16,899 ratings with 4K+ bought in the past month at observation.
S8 Red: the low-price backup pick
The S8 in Red suits drivers who want an inexpensive 1500A box for smaller engines: up to 6.0L gasoline and 3.0L diesel, a 37 Wh high-rate lithium pack, metal clamps with a smart cable carrying 8 protections, and a BOOST button that unlocks when the detected battery voltage is under 9 V for deeply drained batteries. The 3-mode flashlight and power-bank function cover night and phone-top-up duty, and the 12.64 oz body stores easily. Its limits are ceiling and documentation: the engine ratings stop below the GB50, starts-per-charge is not published on the observed pages, and the observed main block showed no star rating, so weigh the 400+ bought in the past month and the seller terms rather than a score. The Amazon US This-item line showed $44.98, In Stock, sold by AstroAI Direct with shipping from Amazon Fulfillment, for delivery as soon as Wednesday, Sep 16.
Safety notes both listings agree on
Both listings frame these as 12-volt lead-acid starting aids with spark-proof and reverse-polarity protection, not chargers or treatments for a failed battery that will not hold charge. Connect red to positive and black to a ground point, keep the clamps off each other, and follow the included guide before using BOOST or override modes. Neither observed page authorizes starting anything other than 12 V vehicles, and cold weather weakens lithium output, so the AstroAI brand Q&A advises keeping the pack warm before a winter start. Store the pack charged and recharge within a few months rather than trusting the maximum standby figure.
What to check before you pay
Prices and stock move during the day, so confirm the live price, seller and delivery date on the listing. Confirm the exact variant too: GB50 1500A for up to 7.0L gas / 4.5L diesel (B07MVY7K43) and S8 1500A in Red for up to 6.0L gas / 3.0L diesel (B0C3B3BVPD) — nearby siblings such as the GB40 1000A, the GB20 500A and other S8 colors or the S8 Air/Pro/Ultra lines are not the units analyzed here. The GB40 (B015TKUPIC) and the AVAPOW A07 (B08T6KPF2F) were both observed with no featured offers and are excluded from this comparison for that reason.
Where to check the exact variants
Compare the Boost GB50 1500A jump starter (Amazon listing with Add to Cart and Buy Now; Shipper/Seller Amazon.com; This-item line observed In Stock at $149.95 on 09/12/2026, delivery as soon as Tuesday, Sep 22) against the S8 1500A jump starter in Red (Amazon listing with Add to Cart and Buy Now; Ships from Amazon, Sold by AstroAI Direct; This-item line observed In Stock at $44.98 on 09/12/2026, delivery as soon as Wednesday, Sep 16). Confirm the live price before deciding; either covers 1500A jump duty, with the GB50 covering larger engines and the S8 covering price and portability.
Sources
- Amazon.com — NOCO Boost GB50 1500A UltraSafe Jump Starter (B07MVY7K43)
- NOCO — GB50 1500A Lithium Jump Starter specs
- Amazon.com — AstroAI S8 1500A Jump Starter, Red (B0C3B3BVPD)