YJS40

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.

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.

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.

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

Purchased April of 2022 (over 4 years ago) and have used it dozens of times on my cars, small engines and even my truck. Works great on all except the truck in winter and I can't blame it. The Cummins 6.7 diesel uses an intake air preheater which uses more power than even the starter but, if I bypass the preheater it'll start the diesel engine even in winter. I rarely ever give 5 stars but this device has earned it.

this thing is awesome works very well, love the fact that it alerts you when red and black cable are placed wrong and has multiple uses not just for jump starting

Amazing jump starter. It perfumes as described in the Amazon listing. I am very impressed. I purchased it for my wife to have in her car for emergency. I will be purchasing another unit to put it in my car. It is very compact and easy to use. My wife felt very safe and confident using it. She likes the USB ports for emergency phone charging. I have purchased the larger model for my semi truck and it has already paid for it self in savings on road call fees. I would highly recommend YESPER line of Jump Starters.

First I don't like the case layout. Its more of a haste to get out and use and then put back than is necessary. I strongly recommend the manufacturer rethink the layout. With that out of the way this will not disappoint you. After watching a review on ProjectFarm's Youtube channel where this had good ratings and price I decided on this one. And I am delighted JUMP STARTING I have jump started my truck with absolute ease more than 20 times. It has no trouble whatsoever doing the job over and over. I have done several jumps without recharging. Not sure how many is possible but the indicator is easy to read. It takes about 1 to 2 minutes to grab out of the case and jump then put back. But again the case is a horrible layout. I cut it up and reconfigured it so now it takes about 30 seconds. CHARGER I handed this to a kiosk clerk who's phone was near dead. She was grateful and it charged her phone speedily. I have used it as such myself on a few occasions. I have used a portable fan with both the usb and the 12v adapter that is included with plenty of power left. CHARGING The simple usb charging makes charging this possible anywhere. LIGHT The built in light is very useful for jumping in the dark. Would love a more ambient diffused option that faced the charging direction, as it can be stark blinding when jump starting in the dark mornings. Highly recommend. Update. I have had mine for nearly 2 years now. Jump started many people's cars with it, including one today at work. Used it at the beach to keep my phone up and running. Still worth 5 stars.