FAQ'S AND SUPPORT

1) Start in 2-3 seconds, remove after 30 seconds, and wait 30 seconds between each jump start.

2) The host power indicator light must be greater than or equal to 3 lights to jump start the car.

3) The single jump start time is within 3 seconds; it is recommended to wait more than 30 seconds between each jump start

Reason:

1) After jump starting, the product is in the engine compartment and the engine is running, which is unsafe

2) The product power is less than 3 grids and cannot be jump started

3) The interval between each jump start is 30 seconds to prevent the line from overheating and wait for the battery voltage to rise

1) First insert the blue connector of the battery clamp into the host, and make sure that the indicator light of the battery clamp is off.

2) Then correctly connect the battery clamp to the positive and negative poles of the car power supply, the red clamp to the positive pole of the battery (+), and the black clamp to the negative pole of the battery (-). The green light is on: it means that the connection is correct and the power is on, and you can jump start.

3) The red light is on and a buzzer sounds: it means that the positive and negative poles are connected incorrectly. Please reconnect correctly and jump start after the green light is on.

4) The green light flashes and a buzzer sounds: it means that the battery voltage is too low. Please press the BOOST button. After the green light is on, jump start within 30 seconds.

5) Neither the red or green lights are on, and there is no buzzer: it means that the battery may be completely damaged. Please make sure that the positive and negative poles are connected correctly, then press the BOOST button. After the green light is on, jump start within 30 seconds.

Using a 5V/2.4A charger, most models can be fully charged in about 3-4 hours.

Car Jump Starter is a multifunctional portable power bank developed for car lovers and business people. Its special function is to jump start the car when the car is out of power or cannot be started for other reasons. It can also be used to charge digital products and outdoor lighting. At the same time, it can also be used with some car equipment, such as air pumps, car refrigerators, etc. It is one of the must-have products for car owners.

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.

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.

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.

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.

The charging time depends on the battery capacity and the vehicle’s alternator output. While driving, the CARKU heavy truck starting battery can be fully charged in approximately:

• 230 Ah: 3–4 hours
• 206 Ah: 3 hours
• 150 Ah: 2 hours

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.

CARKU heavy truck starting battery uses Class A lithium iron phosphate cells(LiFePO4), which are inherently safer. Combined with our safe and intelligent protection board technology, it will not catch fire or explode, so you can rest assured.

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.

The CB11 starting battery is designed for commercial trucks and uses LiFePO4 cells, while the CB08N is intended for passenger cars and uses sodium-ion (Na⁺) cells. In short, CB11 is optimized for heavy-duty truck applications, and CB08N is optimized for everyday passenger vehicle use.

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.