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Recently, the CARKU test team carried a variety of starting power supplies for extreme cold tests in Erlianhot, Inner Mongolia. In low temperature environments, they tested the starting performance, functional output, reliability and safety of the car’s emergency starting power supply all day and under various models. Actual data and experience have proved the quality of CARKU's power supply.
Difficulty Starting The Car In Winter
Normally you may think it is so easy to start a car, but everything is not that simple in winter. For cars, low temperature has the greatest impact on the battery. The charging and discharging capacity of the battery is greatly reduced. When the temperature is too low, the current released by the battery will not reach the starting amount, which will cause the car to start difficult.
CARKU's powerful start-up power supply can solve this problem, but it sets higher standards for its performance. We know that with the fierce market competition, product quality has gradually become the core competitive advantage, and the adaptability of the emergency starter power supply in extreme cold environments is an important factor to test its quality, so it needs to be tested at low temperatures in winter .
No Fear Of The Sub-35 ℃ High Cold
In order to ensure the results of the extreme cold test, this time we specially selected Erenhot, Inner Mongolia, as the test site. Erenhot City is located at the northwestern end of Xilin Gol League. The temperature was greatly reduced due to the influence of cold air. The lowest temperature reached minus 35°C. This not only created natural power for emergency start-up power. The test environment also increases the difficulty of the test team and product testing.

In addition, R&D personnel also tested the tire pressure inflation function and input/output performance of the emergency start power supply.
The start-up test of different models at different times is not only to effectively test the product, but also to provide reliable data reference in the later product development process, but also to relieve customers' "anxiety" about low temperature battery life.
It is worth mentioning that, despite the extreme harsh environment for several consecutive days, the Karcool test team performed well and successfully completed the testing of the power supply.

The successful completion of this test once again demonstrated the strong strength of CARKU's product research and development, laying a solid foundation for creating innovative products, and also showing CARKU's firm determination to provide customers with high-quality products and services as the main force in the field of lithium emergency power supplies.
In the future, CARKU will uphold the spirit of innovation, provide customers with the highest quality solutions and products, and provide customers with a 100% guarantee for smooth travel.
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!)

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Lianrun Rd., Gaofeng Community,
Dalang Street, Longhua District,
Shenzhen,Guangdong,China

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