YESPER 4120A Jump Starter, 12V Car Battery Jumper Starter Portable (All Gas, up to 10.0L Diesel Engine), 26800mAh Battery Start Booster Pack, Jump Box with Carry Case, Jumper Cables, LED Light
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Availability:
20 left in stock
Arrives
Wednesday, May 27
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Size: 4120A
Features
- BATTERY BOOSTER JUMP STARTER - Rated at REAL 4120-amps, the YJS40 car battery jump starter 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 voltage is too low or dead, pressing the BOOST button will force the car to restart
- 26800mAh BATTERY CAPACITY - Our YJS40 portable car jump starter has a true capacity of 26800mAh(99.16WH). Jump pack for car battery 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
- PORTABLE JUMP PACK - The size of our booster pack jump starter is 8.81in*3.53in*1.42in, weighs only 1.38 pounds, and is equipped with a Carry Case, which is not only very easy to carry but also convenient to store, so you dont have to worry about clutter anymore
- LED FLASHLIGHT - This car battery jump starter is equipped with 3 LED working light modes: flash light, strobe light and SOS light. This multi-function flashlight is perfect for camping, outdoor, indoor, travel and more, and can also help you in the dark or in emergency situations
- ADVANCED DESIGN - The new YJS40 series car starter jump box is made of fire-proof ABS material, which is more sturdy and durable for an adventurous life, and has multi-function (rain, dust, and drop resistance
- DSLI IV INTELLIGENT CONTROL TECHNOLOGY - YESPER YJS40 car jumper starter portable. Compared with the previous generation technology, the reassembly of the DSLI IV structure and microcomputer control program increases the voltage by 30% to 14.8V, and the starting current peak value is up to 4120A, achieving 1 second car start. The powerful intelligent temperature control technology reduces the starting temperature, helping you start faster, stronger and safer
- IN THE BOX - YJS40 Car 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
Battery Cell Composition: Polymer
Voltage: 12 Volts
Product Dimensions: 8.82"D x 3.53"W x 1.72"H
Vehicle Service Type: Passenger Car, Motorcycle, ATV, RV, UTV, Truck,Snowmobile, Lawn Mower
Battery Type: Polymer
Voltage: 12 Volts
Compatible with Vehicle Type: Passenger Car, Motorcycle, ATV, RV, UTV, Truck,Snowmobile, Lawn Mower
Battery Capacity: 26800 Milliamp Hours
Amperage: 4120 Amps
Peak Output Current: 4120 Amps
Item Dimensions D x W x H: 8.82"D x 3.53"W x 1.72"H
Brand Name: YESPER
Manufacturer Part Number: YESPER
Manufacturer: YESPER
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, May 27
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
The YESPER 4120A Peak Jump Starter is a powerful, reliable, and versatile tool that every driver should consider having in their car. Here’s my detailed review after using it: Pros: High Power Output: With a peak current of 4120A, this jump starter can handle even large vehicles like trucks and SUVs. It’s highly effective for starting dead batteries in seconds. Compact and Portable: Despite its impressive power, the device is surprisingly compact and lightweight, making it easy to store in your car or carry around. Versatile Functionality: In addition to jump-starting, the device doubles as a portable power bank. The USB ports are great for charging phones, tablets, and other devices on the go. Safety Features: The built-in safety features, including overcurrent, overvoltage, and short-circuit protection, ensure safe operation, even for users who aren’t mechanically inclined. LED Flashlight: The integrated flashlight with multiple modes (including SOS) adds extra utility, especially in emergencies or low-light conditions. Durable Build: The rugged casing is designed to withstand drops and tough conditions, making it suitable for outdoor and emergency use. Cons: Price: The YESPER Jump Starter is on the higher end of the price spectrum, but the performance and features justify the investment. Charging Time: It takes a few hours to fully charge the device, so it’s essential to keep it charged regularly for emergencies. Cable Length: The included jumper cables are slightly shorter than some users might prefer, which could be limiting in certain setups. Final Thoughts: The YESPER 4120A Peak Jump Starter is a must-have tool for anyone who wants peace of mind on the road. Its powerful performance, safety features, and additional functionalities make it worth every penny. Whether you’re dealing with a dead battery or just need a reliable power source on the go, this jump starter won’t let you down. Highly recommended for both personal and professional use.
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Reviewed in the United States on December 30, 2024 by Just4Show
Color: White
I purchased in September of 2023. It's worked great every time I've used it. I'm currently purchasing a second one because it's great product and it's cheap investment to have. Don't let the price mislead you it really is a great product, I use it for work and this second one will be for at home. Im sure I'll be buying a few more for my kids.
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Reviewed in the United States on March 15, 2026 by Lisa R
Color: White
Worked perfectly. Saved me from being stranded on a few occasions. Built in light. Can also serve as a power bank to charge your devices. Carry case keeps everything together nicely.
Reviewed in the United States on February 13, 2026 by a918V
Color: White
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
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Reviewed in the United States on March 9, 2024 by Swapnil Rupji