The YESPER YJS40 is a portable jump starter, and a powerful and fast device that jump-start cars, UTVs, motorcycles and others vehicles.
YESPER YJS40 features
- BOOSTER BATTERY JUMP STARTER. Rated at REAL 4120-amps, the YJS40 can safely jump start all 12V vehicles(up to ALL gasoline and 10.0-liter diesel engines). It can also achieve 60 times jump-start on a single charge, and works even in extreme climate -4~140℉. Even if the car battery voltage is too low or dead, pressing the “BOOST” button will force the car to restart.
- DSLI IV INTELLIGENT CONTROL TECH. Compared with the previous technology, DSLI IV reassembling of the battery structure and microcomputer control program, the voltage is increased by 30% up to 14.8V, the peak current of the starting current reaches 4120A thus reaching 1 second Start the car, the powerful intelligent temperature control technology reduces the starting temperature; helps you start faster, stronger and safer.
- ACCURATE BATTERY CAPACITY. We do not exaggerate the battery capacity of our product. Our YJS40 jump starter has a true capacity of 24000mAh（88.88WH).
- VERSATILE CHARGING OPTIONS. Jump pack built-in USB(5V/2.4A), USB QC(5/9/12V) and Type-C(5V/3A) in/output ports. Besides, a DC(15V/10A) port to power any DC devices, like tire inflator, car vacuum cleaner, car refrigerator etc.
- LED FLASHLIGHT. The LED work light has 3 modes: Flash Light, Strobe Light, and SOS Light. This multi-purpose flashlight is great for camping, outdoors, indoors, travel, etc that help you in the dark or in emergencies.
- Advanced Design. The new YJS series jump starters are made of fire-proof ABS material, which is more sturdy and durable for adventurous life, and have multi-function (rain, dust and drop resistance).
- WHAT YOU GET. YJS40 Car Battery Jump Starter, Heavy-Duty Jumper Clamps, USB to Type C Cable, Cigarette Lighter Adapter, Carrying case, User Manual. And 18-month worry-free warranty & lifetime technical support. So, feel free to contact us with any questions.
YESPER YJS40 Advantages & Disadvantages
| Advantages | Disadvantages |
|---|---|
| ✔️ Portable: It is in a small box that can be easily stored and fits anywhere. | ✖️ Size: It is larger in size than other jump starters. |
| ✔️ Safety: Its features has 10 protections. | |
| ✔️ Advanced Design: It is made of fire-proof ABS material, which is more sturdy and durable for adventurous life. |
How to use this jump starter
Using the YESPER YJS40 jump starter is a straightforward process:
- Connect the Clamps: Attach the red clamp to the positive terminal and then, the black to the negative terminal of your vehicle’s battery.
- Power On: Press the power button on the YESPER YJS40 to activate it.
- Start Your Vehicle: Turn the ignition key, and then, the jump starter will supply the necessary power to start it.
How to Maintain Your YESPER YJS40
If you own a portable jump starter or are considering getting one, it’s crucial to understand how to keep it in top-notch condition
- Regular Inspection for Optimal Performance of Your YESPER YJS40 Car Battery Jumper
- Proper charging is crucial to maintain the functionality of your YESPER YJS40 car battery jumper.
- Storage. Proper storage is equally important, especially if you don’t use your YESPER YJS40 frequently.
- Regularly testing your jump starter ensures that it’s in working condition when you need it.
- Whenever possible, store your YESPER YJS40 portable jump starter in a moderate temperature environment between 50 ºF – 70 ºF. Like vehicle batteries, exposure to extreme temperatures is detrimental to jump starter batteries, both in the short term and long term.
- Respect the cycles. Every jump starter is subject to a duty cycle in which the vehicle can be cranked only so long before a period of rest is needed. For almost all jump starters, the recommended duty cycle is between 5-6 seconds of cracking followed by 3-5 minutes of rest.
- Clean clamps. A battery in poor condition may have battery acid on the posts, so wiping down the clamps after jump starting a vehicle always is a good practice to keep the clamps from becoming corroded
If you want more information about how to maintain your car battery jumper click here.
User Reviews
Andrew L. Dugan – ★★★★★ (5/5)
So nice I bought it twice
I found myself with a dead battery after leaving my headlights on at the doctor’s office on a rainy day. I had nothing with me to jump start my car, so I researched and the yesper seemed like a good option. So, I bought it and I’ve used it to start my car, a stranger’s car once, and my riding mower once. I bought a 2nd one so I’ll always have one in each car. One of my cars is push button start. It had sat for 3 weeks and the battery was too low to start it. I left it alone for 2 days, but I forgot to push the button again to turn the car off. Then, the battery was completely dead when I jumped it 2 days layer. The yesper is a great product.
Jay -★★★★★ (5/5)
Project car assistant
I have a project car with a current draw and I has used at least a dozen times on a single charge.
Chris –★★★★☆ (4/5)
Pretty decent for the money
The unit started several vehicles and was used to raise and lower the jack on my camper several times on a single charge. I would have gave it 5 stars if not for the fact that when it shows 1/2 charge on the indicator the thing is actually done it won’t even jump a lawnmower at that point. But I would have to say I would buy again oh and one more thing that could be better is the cable length maybe add a few more inches to them