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As 2024 transitions into 2025, CARKU successfully completed its two-week Winter Test Challenge in northern China. The testing team traveled to areas like Hailar, Genhe, and Mohe in Heilongjiang, where temperatures regularly drop below -30°C and sometimes reach -40°C.
Testing CARKU Heavy Duty Jump Starters and Heavy Truck Starting & Energy Storage Batteries, the team confirmed that these products performed excellently, consistently providing stable power and successfully starting trucks even in extreme cold. This success has earned high praise from truck drivers and solidified reputation of CARKU for reliability and quality.
CARKU Founder Cloud Lei emphasized the importance of real-world testing in extreme cold. “Starting heavy trucks in temperatures as low as -40°C is a global challenge,” he said. The winter tests allow the R&D team to engage directly with users, gather valuable feedback, and optimize product design and performance for better market reliability.
Throughout the testing, the team evaluated starter performance, capacity, and key components. They also provided free jump starter services to stranded truck drivers, earning widespread appreciation. This direct interaction with users provided crucial data to improve CARKU products.
Heavy Duty Jump Starter: Smart safety features, portable design, and various models with peak currents of up to 5,000A for extreme cold conditions.
Heavy Truck Starting & Energy Storage Battery: Low-temperature starter capability, long lifespan (8-10 years), and advanced safety features.
12V Starting & Energy Storage Battery: Perfect for small vehicles, offering high cold starter performance, durability, and safety.
Powered by advanced lithium iron phosphate (LiFePO₄) technology, the CARKU JS-78F delivers a peak current of 2300A—engineered to handle everyday driving demands with confidence. Its sleek, compact design fits easily into your trunk while providing reliable jump-start performance for cars, SUVs, and heavy-duty equipment. With integrated emergency lighting and built-in mobile device charging ports, the JS-78F is more than just a jump starter—it’s your all-in-one road companion for safety, convenience, and peace of mind wherever you go.
(Looking for Jump Starter ODM/OEM Solutions? Contact us for your exclusive quote today!)
Defy Extreme Cold with Confidence | JS-373B Heavy Duty Jump Starter
Engineered for the most demanding starts, the JS-373B delivers an impressive 7000A peak current and supports both 12V and 24V systems — making it the ideal solution for trucks, buses, heavy machinery, and more. Built with vehicle-grade 60℃ high-rate lithium cells, it ensures powerful ignition even in freezing conditions down to -40°C. Whether you're facing harsh winters or powering up large engines, the JS-373B stands ready with unmatched strength, reliability, and rapid charging support.(*For Jump Starter ODM/OEM Solutions, secure your exclusive quotation now!)
Unleash Dual Power with Our 12V & 24V Lithium Jump Starter
Engineered for heavy-duty performance, this lithium jump starter delivers up to 7000A peak current to start diesel and gasoline engines in trucks, buses, RVs, and construction equipment. Designed for 12V and 24V systems, it offers reliable power, fast activation, and broad compatibility—ideal for commercial fleets and professional roadside service.
(*For Jump Starter ODM/OEM Solutions, secure your exclusive quotation now!)

Building A, Qixing Creative Square,
Lianrun Rd., Gaofeng Community,
Dalang Street, Longhua District,
Shenzhen,Guangdong,China

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