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Recently, the CARKU R&D team embarked on a journey northward, conducting tests with the Heavy Duty 12V & 24V Jump Starter and the Heavy Truck Starting & Energy Storage Battery. They traveled through Nanchang, Zhengzhou, Shanxi, Baotou, and finally arrived in Hulunbuir City.
To ensure the effectiveness of the extreme cold testing, the R&D team specifically chose Hailar District in Inner Mongolia as the location for the low-temperature tests. Hailar District is located in the northwest of Hulunbuir League and experiences a significant drop in temperature due to cold air. The lowest temperature reached -39°C, creating a natural test environment for the heavy-duty jump starter series while also increasing the challenge for the testing team and the products being tested.
In the winter in northern regions, cars failing to start is a common occurrence. As the temperature drops, the charging and discharging capacity of batteries decreases significantly. When the temperature is too low, the battery's released current may not meet the required starting amount, resulting in difficulties in starting the vehicle.
In this testing, the R&D team provided free rescue assistance to various types of 24V trucks and cargo vehicles.
The main testing content included the starting performance of heavy-duty jump starters with different capacities in low-temperature conditions, the energy requirements for starting different types of trucks, and the performance of key components. Parameters such as the number of starts, peak current during startup, and average current during startup were measured.
The test results showed that both the Heavy Duty 12V & 24V Jump Starter and the Heavy Truck Starting & Energy Storage Battery performed well at temperatures close to -40°C. Despite the harsh weather conditions and extreme cold, making it difficult for engines to warm up, the products maintained stable power supply, successfully starting the vehicles continuously. This performance gained recognition from numerous truck owners, proving the quality of CARKU jump starters with actual data and experiences.
This testing involved a long journey of 5,000 kilometers, lasting for 13 days, and endured temperatures ranging from 20°C to -35°C, facing various weather challenges. It was successfully completed, fully demonstrating the strong R&D capabilities of CARKU products and laying a solid foundation for creating better products. We will also learn from the experience and customer feedback to provide customers with even better products and services.
● 4000A PEAK POWER FOR HEAVY-DUTY VEHICLES – 4000A PEAK POWER FOR HEAVY-DUTY VEHICLES – Built for 6.6L gas trucks, SUVs, and commercial vehicles, delivering instant starts in seconds.
● SODIUM-ION TECHNOLOGY BUILT FOR EXTREME COLD – Advanced Na⁺ battery reduces reliance on lithium and lead, ensuring reliable performance down to -40°C.
● OEM/ODM JUMP STARTER AVAILABLE — NEED CUSTOM? Talk to our experts for sample testing.
● 2 IN 1 JUMP STARTER – A high-torque air compressor meets a high-performance jump starter. Whether it’s a flat tire or a dead battery, this unit provides instant 12V ignition and high-pressure inflation, ensuring you are 100% self-sufficient on the road.
● RAPID PRESET TIRE INFLATION – Engineered to restore proper tire pressure in under 3-5 minutes. Featuring an intelligent auto-shutoff system and real-time digital pressure monitoring to prevent over-inflation, ensuring maximum driving safety and fuel efficiency.
● 360° EMERGENCY UTILITY HUB – More than a CAR JUMP STARTER. Integrated with a 3-mode tactical lighting system (SOS/Strobe/Flashlight) and a high-capacity power bank to keep your GPS and smartphones charged during off-grid travel or night-time breakdowns.
● SCALABLE ODM/OEM MANUFACTURING – Looking to dominate the automotive accessory market? We provide full-service customization for air-integrated units, from PSI performance tuning to bespoke housing designs. Secure your exclusive quotation today.
JS625 Sodium-Ion Jump Starter 1500A Peak – Works at -40°C to 80°C – Starts Cars, SUVs & Motorcycles – 10400mAh Ultra-Lightweight Portable Emergency Car Battery Booster with LED Flashlight
● 1500A PEAK, SODIUM-ION POWERED — Starts cars, SUVs, and motorcycles instantly. Na⁺ sodium-ion technology delivers stable cranking power in extreme conditions where conventional batteries fail.
● WORKS AT -40°C TO 80°C (-40°F TO 176°F) — From frozen winter mornings to scorching desert highways, the JS625 performs where lithium and lead-acid simply can't.
● OEM/ODM SOLUTIONS AVAILABLE — Looking to private-label or customize a sodium-ion jump starter? Contact us today for your exclusive quote.




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

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