FAQ'S AND SUPPORT

High-capacity ultra-large polymer lithium battery, it has the characteristics of small size, light weight, long power, safe use, etc. Polymer lithium-ion battery is the most technologically advanced in the battery industry and belongs to the latest generation of rechargeable lithium-ion batteries.

A: Jump starter is an emergency tool to start your vehicles in a short time. it is used as a power source to recharge the battery when it is drained or out of power. Besides, it also can be used a battery charger to mobile devices, such as smartphone, tablet, laptop, MP3, bluetooth, ect. or as a led lamp to light through the darkness.

For example, heavy use (2000wh+ PPS): supports high-power devices such as cpap machines, medical equipment, power tools, electric grills, and household appliances—ideal for extended off-grid living, rv travel, or emergency backup.

For truck starting battery applications, Grade-A LiFePO₄ batteries offer higher safety, while lower-grade B or C cells carry a greater risk of failure.

Truck starting batteries using LiFePO4 technology can last over 3,000 charge-discharge cycles, providing significantly longer service life than conventional lead-acid batteries. With proper maintenance, they can reliably power your truck for over ten years.

Carku heavy truck starting batteries support vehicle jump starting and parking air conditioning operation. Built with low-temperature LiFePO₄ cells, they deliver reliable performance in cold climates, offer over 3,000 charge cycles (up to 10 years of service life), and feature multi-layer safety protection. The battery also supports forced one-button start, GPS positioning, mobile app monitoring, and comes with a warranty included.

Carku heavy truck starting batteries feature a true 24V design for easy installation, certified safety (CE, FCC, RoHS, UN38.3), long service life of up to 10 years with a warranty included, reliable operation from –40°C to 60°C, smart power reserve to ensure engine starting, high-capacity energy for parking air conditioning, and mobile app support for real-time monitoring and control.

When the car battery cannot start the car for various reasons, the CARKU Jump Starter will work wonders. First, check the power level of the CARKU Jump Starter, usually make sure that there are 3 bars or more. Connect the positive and negative poles of the battery clamp to the positive and negative poles of the car battery, red (positive) to red, black (negative) to black, and after clamping, insert the battery clamp plug into the CARKU Jump Starter, quickly turn the car key to the start position, and start the car (after clamping the battery clamp, the starting power supply will charge the car battery. If the battery clamp is clamped for too long, the starting power supply may be unable to start the car due to lack of power). If it still cannot start, wait for 30 seconds and then turn the key until it starts successfully. After starting successfully, unplug the battery clamp plug from the CARKU Jump Starter, and then remove the clamp from the car battery.

Yes. The CARKU heavy truck starting battery is built with special-grade low-temperature battery cells and an original BMS control system. It provides multi-layer protection against extreme cold, overheating, overcharging, short circuits, puncture, and impact, ensuring stable and safe operation in demanding trucking environments.

During the discharge process, the battery is polarized. The greater the current, the greater the polarization. For the same current, the higher the temperature, the smaller the polarization. When it is cold, the battery has power but it is difficult to start. However, after using it several times, it can start the car normally again. In fact, when the high current is discharged, the internal temperature of the battery is heated, and the temperature rises, providing a good temperature environment for the internal battery to ensure high-power output to start the motor. Another point to point out is that when you cannot jump start for the first time, do not continue to use it immediately. Because of polarization, the battery voltage has not fully recovered. Continuing to use it is easy to damage the internal battery and affect the high current output. Therefore, it is recommended that the interval between each start is about 30 seconds.

Based on our tests, the CARKU heavy truck starting battery can power a parking air conditioner for:

230 Ah battery: over 12 hours
206 Ah battery: over 10 hours
150 Ah battery: over 8 hours

Actual usage may vary depending on the air conditioner model. Users can monitor remaining battery power in real time via the mobile app.

According to the Civil Aviation Administration's "Announcement on the Regulations for Civil Aviation Passengers Carrying Power Banks on Board", when passengers carry battery products on board, if the rated energy of the product does not exceed 100Wh, no approval from the airline is required; if the rated energy exceeds 100Wh but does not exceed 160Wh, it can be carried only after approval from the airline. The capacity of the CARKU Jump Starter JS-01 Deluxe Edition is 44.4wh, and each passenger can carry two. The capacity of the JS-03 model is 29.6Wh, and three can be carried.

Yes. The CARKU heavy truck starting battery features intelligent low-power protection to ensure safe vehicle starting. When the battery drops to about 15%, the parking air conditioner stops drawing power, and at around 10%, the battery cuts power to the entire vehicle. Users can activate the forced start button to start the engine and recharge the battery.

Most EVs carry the same type of 12V battery you'll find in ICE cars, meaning you can technically jump start it the same way. This battery is different to the larger, main battery pack used to power the motor of an EV, which is typically made from lithium-ion.

Bike battery lifespan: While this is specific to motorcycle batteries, the concept can be applied to jump starters for motorcycles or similar vehicles. Understanding battery lifespan (2-5 years) and charge cycles (500-1,000 full charges) helps in gauging how long a jump starter may remain effective if used frequently.

Generally, imported cars are equipped with body system protection. Once the car runs out of power, the safety system stops running and the program is locked. Program decoding is required to connect the power supply to start the car, so to start an imported car, the car's own battery must have power.