We value your privacy.
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing
efforts.
Cookie Setting RefuseAccept All Cookies
With a global shortage of new cars and ongoing concerns over the increased cost of living, we are seeing motorists hanging onto their vehicles for longer. These older automobiles require extra care to keep the battery in good condition.
Carku has the following tips for drivers of older cars, to keep vehicle batteries in the best of health, extend battery life by up to three times and avoid the cost and inconvenience of vehicle breakdown.
Three Tips For Extending Vehicles Battery Starter Life
When shut off, the jump starter can hold a full charge for approximately 18 months. How? Our extremely low self-discharge design makes our products capable of storing charge for a longer time than other jump starters.
Maximize your CARKU's battery performance related with the following factors.If you store it for a long time, two factors will affect the overall battery performance: the battery level and storage temperature. Therefore, we have these recommendations for you.
(1) Regular maintenance charging
Recharge your CARKU at least every 3 months to keep the jump starter in good working condition, you should charge it at least every 3 months.
(2) Adapting to the weather
Store it in a room temperature: Our device is designed to perform well in a wide range of storage temperatures. But to prolong its lifespan, please avoid charging or leaving CARKU products in extremely hot or cold environment, including direct sun exposure.
(3) Keep 80% battery Before Safe Starting
Keep the battery level above 80%:This is for the consideration of emergencies. When starting a car with a dead battery, the engine demands extra power from the starter motor. Thus, we suggest that you charge the device to above 80% to remain prepared.
How Long Will My Battery Hold a Charge?
A Carku Lithium Iron Phosphate (LiFePO4) battery has a typical self discharge rate of 5%-8% per month. In other words, it takes six months for a Carku lithium battery to self-discharge to the same level that a standard battery does in thirty days. That means your battery will last longer before you need to use it. It also makes it an optimal battery for emergencies turn on when the lights go out.
As a battery ages, its own discharge rate increases; after 4-5 years of use, you may notice that your battery discharges 10-30% every month. When a battery's own drain rate exceeds 50% in a 24-hour period, it is nearing the end of its useful life. Typically, this occurs between 2,000 and 3,000 recharge cycles, or approximately 5-11 years of regular use.
Connecting direct to the battery. Positive on positive,negative on negative.Never connect the negative terminal of one battery directly to the negative terminal of the other.
Apart from these, the risks of giving an emergency jump starter to another vehicle, not checking battery health before jump-starting.
How To Properly Jump Start a Car?
The portable jump starter instructions provided here are from the Carku Jump Starter JS557 mentioned above, and are typical for most battery-powered jump starters, but always check your product manual before using any device.
Need to Know JS557 Jump Starter Accessories
Try a lithium jump starter.It’s much lighter than lead-acid jump packs and last a lot longer. The accessories you should know when you wholesale portable jump starters
1.Connect the carku jumper cable clamps to the battery terminals (first Red to Positive, then Black to Negative )
2. Connect the jumper cord to the jump starter.
3. Wait for the green LED on the jumper cord to light up before starting your vehicle.
4. Disconnect the jumper cord from the jump starter, then from the battery in reverse order.
After making sure the battery type is lithium-ion,the normal circumstance happened the extrem circumstance such as the Norway and Sweden. The most important thing is energy cells, which should be charged at least every 3 months or 6 months.
2.What is the advantages of lithium jump starters?
The general lifespan of a lithium battery should be 1000+ times, implying that lithium batteries have a lifespan of 3 or 4 years, or approximately 300 to 500 fully charged cycles, according to manufacturer ratings.
3.How long should I jump-starting a car batery?
Our Carku lithium jump starter has an over-charging protection, it’s safe to keep the jump starter plugged into the wall outlet and always keep it charged.We recommend you to jumpstart safely then waiting in less than one minute.
You Also Might Like
How to Charge a Portable Jump Starter: Step-by-Step Guide by CARKU
Car Battery Jump Starter Amps: How Many Do You Really Need
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!)

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

WhatsApp