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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.
JS617N Heavy Duty Sodium-Ion Jump Starter 4000A Peak – Starts 6.6L Gas Trucks & Commercial Vehicles – Works at -40°C – Portable Emergency Car Battery Booster with LED Flashlight
● 4000A PEAK POWER FOR HEAVY-DUTY VEHICLES – Engineered for 6.6L gasoline trucks, SUVs, and commercial vehicles, the JS617N delivers an instant 4000A surge to get you back on the road in seconds.
● SODIUM-ION TECHNOLOGY BUILT FOR EXTREME COLD – Advanced sodium-ion (Na⁺) technology: less dependent on scarce lithium and lead resources, built for a sustainable future.
● OEM/ODM JUMP STARTER AVAILABLE — Need a custom solution? Contact us for your exclusive quote today.
A reliable all-in-one tyre inflator jump starter does more than just inflate tyres. It restores proper tyre pressure in minutes and delivers instant emergency starting power when your car battery lets you down.
It also features three lighting modes — SOS, Strobe, and Flashlight — making it ideal for outdoor use and nighttime emergencies. Compact enough to fit in your bag, this portable jump starter also functions as a mobile power bank, allowing you to charge your electronic devices anytime, anywhere.
Looking for Jump Starter ODM/OEM solutions? Contact us today for your exclusive quote.
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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