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Decent.
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Prices may varyThis product ranks #9 of 20 in Jump Starter.Three above it ↓
Last reviewed June 21, 2026
TL;DR No third-party certification (CE only); 3000A peak claim not independently verified. The 65W USB-C charging is a genuine standout feature, but the 12.8-inch cable is a real-world limitation and the CPSC recall check requires manual browser verification before treating this as fully cleared.
The Rexing RJ3000 is a 20000mAh portable jump starter claiming 3000A peak output for 12V gas and diesel engines. The manufacturer's product page states compatibility up to 8L gas and 8L diesel engines; a marketing image suggests higher figures, but the product page text is the conservative and directly citable claim. No independent cranking tests existed as of the original research date, so the peak-amp label claim is unverified. Battery chemistry is not disclosed on the product page or in available imagery, so the unit is scored conservatively as standard Li-ion or LiPo without a confirmed battery management system. IP64 weather resistance and an operating range of -4 to 140 degrees Fahrenheit are confirmed from product page specs. The 65W USB-C fast charging (recharging the unit itself in approximately 1.3 hours, per Rexing) is the strongest feature in the set. The cable measures 12.8 inches per the box-contents image, which is well below the 3-4 foot median and limits reach in deep engine bays. No community reviews or long-term data existed as of the research date: this is a newly launched product.
Drivers who primarily need a compact jump starter for smaller gas vehicles (4-6 cylinder sedans or crossovers) and want USB-C 65W fast charging as a dual-purpose travel battery may find this worth considering once community cranking reports accumulate. Skip it for now if you need verified cold-weather performance on a V8 truck or diesel pickup, if cable reach in a deep engine bay is a concern, or if you require UL or ETL certification: no third-party electrical safety listing exists for this unit, and the CPSC recall check has not been completed via direct database query.
The RJ3000 is CE marked but not UL-listed or ETL-certified; the CE mark is self-declared for EU-market import and does not reflect accredited laboratory electrical safety testing. Battery chemistry is undisclosed; no documented thermal-runaway incidents were found, though the CPSC database could not be directly queried (returned HTTP 403). Li-ion and LiPo batteries are recyclable via Call2Recycle drop-off locations (Home Depot, Lowe's, Best Buy); no manufacturer take-back program was found.
No. The RJ3000 carries FCC, CE, RoHS, and UN38.3 certifications but is not UL-listed or ETL-certified. CE marking is a self-declared EU-market import certification; it is not equivalent to UL 2743 or ETL third-party lab testing, which require an accredited laboratory to verify the unit's current and thermal safety. Buyers who prioritize third-party electrical safety validation should look for a UL-listed jump starter instead.
The product page text states compatibility with engines up to 8L gas and 8L diesel. Note that a marketing image on the Rexing site shows different figures (12L gas / 9L diesel), but the verified product page text is the conservative and directly citable claim. No independent cranking tests existed as of the original research date, so the 3000A peak label claim has not been verified by a third-party bench measurement. For large V8 trucks or diesel pickups, confirm community reports before relying on this unit.
The included jumper cable is 12.8 inches (about 32 cm), which is well below the 3-4 foot category median. This can make it difficult to reach both battery terminals in vehicles with deep engine bays, or to clamp onto batteries positioned on opposite sides of the engine bay. The short cable is the primary reason the clamp-and-cable quality score is below average. If cable reach is a concern for your vehicle, verify fitment before purchasing.
Rexing's product imagery states the unit stays charged for up to 2 years under normal storage conditions. This is a manufacturer marketing claim with no independent community verification as of the initial research date (the product was newly launched). Standard Li-ion jump starters in this category typically hold a usable charge for 3-6 months before a top-off charge is recommended. Until community long-term reviews confirm the 2-year claim, plan for a top-off every 3-6 months.
No active CPSC recall was found for the Rexing RJ3000 in web search results as of the research date. However, the CPSC database (cpsc.gov) returned an HTTP 403 error during direct lookup, meaning a direct query of the CPSC records could not be completed programmatically. This product is flagged for manual browser verification at cpsc.gov before relying on it as cleared. The lifecycle state is set to reflect this unresolved check.
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