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YESPER

YESPER Battery Jump Starter - 4120A Peak Portable Car Starter (All Gas, up to 10.0L Diesel Engine), Auto Battery Booster Pack,Jump Box, DSLI Safe Tech Safely Start All 12V Vehicle& DC 15V Ports

    • Based on 1,063 reviews
Condition: New
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$68.99 Why this price?
New Year Deal · 31% off was $99.99

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Returnable until Jan 31, 2025

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Availability: 20 left in stock
Fulfilled by Amazon
Arrives Friday, Jan 17
Order within 9 hours and 51 minutes
Available payment plans shown during checkout

Color: WHITE(4120A)


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 achieve 60 times jump-start on a single charge and works even in extreme climates -4~140F. 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. and a DC(15V/10A) port to power any DC devices, like a 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, and helps you in the dark or emergencies
  • [Advanced Design]- The new YJS series jump starters are made of fire-proof ABS material, which is more sturdy and durable for an 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. If you have any questions or concerns, please get in touch with us

Brand: YESPER


Product Dimensions: 8.82"D x 3.53"W x 1.72"H


Item Weight: 2 Pounds


Amperage: 4120 Amps


Peak Output Current: 4120 Amps


Brand: ‎YESPER


Product Dimensions: ‎8.82"D x 3.53"W x 1.72"H


Item Weight: ‎2 Pounds


Amperage: ‎4120 Amps


Peak Output Current: ‎4120 Amps


Manufacturer: ‎YESPER


Item Weight: ‎2 pounds


Item model number: ‎YJS40


Batteries: ‎1 Lithium Polymer batteries required. (included)


Manufacturer Part Number: ‎YJS40


Date First Available: January 8, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jan 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great product!
Color: WHITE(4120A)
I've had to use this product a handful of times since I purchased it, and had to come back to write a review! Product works great! It's very easy to use - you can't mess it up! It's well built and holds its charge for a very long time. Highly recommended. No more jumper cables!
Reviewed in the United States on September 3, 2024 by Johnnycakes
    • Heard from on Project farm's youtube - works great
Color: WHITE(4120A)
Discovering this battery jump start pack through Project Farm's YouTube channel has been a game-changer. This compact yet powerful device lives up to its reputation, effortlessly jumping off my zero-turn mower and Chevy S10 without breaking a sweat. The convenience it offers, especially when dealing with unexpected dead batteries, is unparalleled. The ease of use is remarkable, making it a go-to solution for both my lawn equipment and my truck. It's a worthwhile investment for anyone seeking a reliable and efficient battery jump start pack that delivers on its promises. Overall, this device has earned its spot in my essential toolkit, providing peace of mind and quick solutions when I need them the most. Additionally, the build quality is impressive, giving a sense of durability and reliability. The compact design makes it easy to store in my vehicle without taking up much space. The pack's ability to jump-start both my zero-turn mower and Chevy S10 showcases its versatility, making it suitable for a range of vehicles. Considering its performance, user-friendly features, and the peace of mind it brings, this battery jump start pack is undoubtedly a valuable addition for anyone on the lookout for a dependable solution for unexpected dead batteries. ... show more
Reviewed in the United States on November 22, 2023 by Alexander B
    • Works great! Saved me twice already.
Color: WHITE(4120A)
This arrived on a Tuesday evening. Wednesday morning we were running late only to find the van dead. I ran inside, opened the box and quickly jumped the vehicle. No other car with jumper cables like before. The following day my brother borrowed the van to move my nephew. I have a parasitic draw somewhere. I told him not to use any electrical unless the engine was running. He decided to use the flashers while parked with the engine off. It died. I walked him through using this and he quickly jumped the van. I left it in the van, even though it was below zero several nights in a row. But three or so days later I needed another jump. The unit worked and jumped the van again. That’s 3 jumps in less than a full week, without recharging (although I should have) and sittting out in the cold. Worth every penny. ... show more
Reviewed in the United States on April 11, 2024 by LAA
    • Good Battery Life. Strong plastic smell
Color: WHITE(4120A)
I have tried the following Jump Starters and since most of the time I will be using it for charging devices my review is for how good the batteries are for charging mobile devices and how well they hold the charge. They are all over 2500A and do a good job with jump starting of my SUV. My recommendation: If you don't need voltmeter and digital display then any of the DBPower jump starters or Yester are good. If you need voltmeter then Mostools and Imazing are the best. Mostools M6 3000A - Looks high quality product with one of the thickest and biggest jump starter cables. - Takes less than 5 hours to charge - Good battery. Can charge over 3 Mobile phones - Plugging in phone automatically starts the jump starter and when done automatically powers off the jump starter. - Very powerful LED light. 2 separate power buttons for charging and LED lights. - Large Display and good case. - Contains Voltmeter to measure the battery level of Cars battery. However once charges the Jump Starter turns off and you cannot see after charge battery level. The manual says that when the output battery voltage is higher than Jump Starters battery voltage it turns off. - All the USB ports are 3A for fast charging which helps with quick charging your mobile devices. - Also the only one in the list which comes with charger. - 24 months warranty. Support is available through Seller messages to NCYJC. - Bad: Their phone no and emails on the user manual yield no response. There is no cigarette lighter adapter. YaberAuto 3000A - Small one and doesn't look high quality - Takes upto 6 hours to charge - Bad for charging. Only one mobile phones charging takes up 80% of the charge from the jump starter battery. - Need to start the jump starter to charge and need to remove the plugged in device to automatically stop it. - Average LED Light. Power and Lights are controlled from the same button with long press for lights. - Small display - Contains volt meter on the charging cable - 2.1 and 2.4 A USB ports only so no fast charging for latest mobile phones - No charger for the jump starter - 24 months warranty however there was no response to my questions/requests from their website. DBPower 2750 & 3000 - Very high quality and compact. The best looking in all I have reviewed. Jump starter cables are still better in Mostools - 5-7 hours to charge the jump starter battery - Good battery. Can charge about 3 Mobile phones (for 3000A over 3 mobile phones) - Need to turn power on to charge mobile device - Average LED lights. One power button for both LED and power. - No display and excellent case. - No Voltmeter - Fast charge available USB Ports. USBC in out and 1 USB fast charge port. One USB port at 2.1A - No charger for jump starter - 12-18 months warranty. Best customer service in this entire list. You can chat online from their website and they follow through to closure. The warranty varies by product so please check warranty. Buture 2500A - Average quality and everything is similar to YaberAuto hence not highlighting all the points. - Bad for charging. Only one mobile phones charging takes up 100% of the charge from the jump starter battery Yesper 4120A - Good quality. Although had plastic smell the most out of all in this list - Takes 8 hours to charge the jump starter - Good battery. Can charge over 3 Mobile phones. Plugging in phone automatically starts the jump starter and when done automatically stops the jump starter - Average LED lights. One power button for both LED and Power - No display and excellent case - No voltmeter - Fast charging available including USBC in/out at 3A - No charger for jump starter. Cigarette Lighter female cable available - 18 months warranty. No response for my queries from Yesper site Imazing IM29 from Costco - Good quality however a bit expensive compared to all the above - Over 5 hours to charge the jump starter - Good battery. Can charge upto 3 mobile phones. Need to start the jump starter to charge the mobile device. - Average LED Lights. One power button for both - Display available and excellent case - Some reviews say that voltmeter exists however the one I purchased didn't have voltmeter on the cable - Fast charge available USB Ports. USBC in out and 1 USB fast charge port. One USB port at 2.1A - No charger for jump starter. Cigarette Lighter female cable available - 24 months warranty. No response from support which is why I returned this product ... show more
Reviewed in the United States on March 9, 2024 by Swapnil Rupji
    • I'm very impressed
Color: WHITE(4120A)
I decided to buy the YESPER YJS40 after seeing it reviewed on Project Farm (a GREAT YouTube channel that reviews stuff). I bought it about 2 months ago to keep in my truck and go on my boat with me. After fully charging it, I put it in my truck and left it. Yesterday, I decided to take my neighbor's 1955 Chevy for a ride with my son. Since they've been gone for almost a month in Australia, the battery was totally 100% dead. I hooked it up, and nothing happened. That's because the battery was completely dead. I then remembered the booster button. Once I hit it, the car started turning over immediately as if it had a full battery. It took 4 long cranks, since it hadn't been started in so long. The Yesper kept cranking it like a new battery. Once I got the car started, only 1 segment on the Yesper charge status bar had dropped. So, it most likely could have kept cranking a lot, lot, lot longer. I have decided to purchase a second one, so I can always have one in my truck and one in the boat, because I know I'll forget to swap it when I actually need it. Well, I'll most likely get a third one for my wife's car and attempt my best to teach her how to use it. (I'm already dreading that). The YESPER YJS40 is small and light, so keeping it in a car or boat is not an issue at all. My ONLY criticism is that the booster button is hard to see, feel and push. But that is a very minor criticism. I highly recommend this product. If I remember, I'll do a one year update. ... show more
Reviewed in the United States on February 20, 2023 by PeterInCrosby

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