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⚡ Power Up Anywhere, Anytime — Never Get Stranded Again!
The YUSMAN 4000A Car Jump Starter is a compact, high-capacity 12V battery pack designed to jump-start gasoline engines up to 7.0L and diesel engines up to 5.5L. Featuring 4000 amps peak current, it delivers up to 40 jump starts per charge and includes smart safety protections like spark-proof technology and reverse polarity prevention. Equipped with dual USB outputs including Quick Charge 3.0, it doubles as a fast portable charger. The built-in 4-mode LED flashlight enhances emergency readiness, making it an essential tool for drivers seeking reliable, all-weather roadside power.





| ASIN | B0D13T1SWC |
| Amperage | 7000 Amps |
| Battery Capacity | 21800 Milliamp Hours |
| Battery Cell Composition | Lithium Ion |
| Battery Type | Lithium Ion |
| Best Sellers Rank | #152,469 in Automotive ( See Top 100 in Automotive ) #407 in Jump Starters #2,533 in Automotive Replacement Batteries & Accessories |
| Brand | YUSMAN |
| Brand Name | YUSMAN |
| Compatible with Vehicle Type | Automotive |
| Customer Reviews | 4.5 out of 5 stars 261 Reviews |
| Included Components | Car Jump Starter |
| Item Type Name | Car Jump Starter |
| Manufacturer | YUSMAN |
| Manufacturer Part Number | Y02 |
| Manufacturer Warranty Description | 2 |
| Model Number | Y02 |
| Peak Output Current | 7000 Amps |
| Vehicle Service Type | Automotive |
| Voltage | 12 Volts |
R**N
Small but powerful along with being very easy to use
Very small in stature and lightweight. Had it now for about 6 months and the quality of the product is held up well along with the battery life because it's been some time sitting on the shelf. I've used it more to help neighbors out to start their vehicles or my wife's car. It's a very versatile jump starter that will start everything except for my large diesel engine. My smaller side by side diesel which requires a very strong battery it will start that. My wife travels for skiing and I'm going to ensure that she packs that up to go with her to ensure that she could always start her car in the very cold environments that she will be in. Definitely a lot easier to use than my large battery charger booster pack. Very simple to use that even my wife is comfortable in using. At our location where we live you were not going to get AAA so you must be very self-sufficient and this is definitely something great to have as is very quick and easy to use, and very safe, then trying to string across jumper cables. Not everywhere we go is there enough room to either get around a stuck vehicle so this just simplifies starting a dead battery.
G**B
Just what I needed.
Just what I needed and very happy with my purchase., I was afraid I wouldn't have a way to jump start my vehicle if needed so I purchased this Jump starter. I have had it a little over a month and needed it for the first time. Worked like a charm and so easy to use. Just remember it has a 90 second timer to start your vehicle, if you don't start it with in the 90 seconds, you will need to remove the clamps and start again.
M**7
Best Christmas Present in years
Have you looked at the Price of similar units?? This was a steal of a deal. The good.... Price, quality, Simplicity. Universal Type C charger. They actually work! I have used mine (just yesterday) probably 10 times so far. It cranked over my V8 with ease. Peace of mind is hard to come by now days so I purchased 5-6 for Christmas presents for my family. We all have that moment when we realize we left the light on and the battery is dead. With this unit, In less than five mins, you'll be on your way. Before placing back in the box... I place it on charge to be ready for the next time. I actually believe it would start a vehicle 4-6 times but don't want to test it . My ONLY Gripe is no carrying case but that keeps the price low. Best to you.
S**K
Worked perfectly
Worked right out of the box. Jumped my dead battery no problem. Full charge takes a bit but no issues.
P**R
It Works!
Had to wait til I used it to see how this was going to go. Months had bassed by before there was a need to use it and thought I can't return this if this doesn't work after more than 60 days have passed. Well here it is, This thing works after sitting in my trunk for 2 months. When I got it I charged it till all the lights were full and put it in the trunk. Not disappointed. Highly recommend it. Portable and smal..
J**Y
Jump stater
This is a very compact easy to use jump starter. The initial charge last a good amount of time, but will need recharging every 3 to 6 month of not used. I like to top mine off after I use it although it isn't necessary. Oh and do I mention this is my 3rd unit. They are so inexpensive I have one for every vehicle I have, light weight so easy to use. The quality seems to be 2nd to none.
S**A
Pretty good buy can’t wait to use it
I haven’t used it yet but it looks pretty legit Battery life is said to be good if it’s kept charged and it’s not too heavy and crazy big so it can fit in a secure corner in your trunk or so I tried the flash tho and it was pretty good
M**D
Terrible
I have owned two of these jump boxes and both have failed. 0 stars
E**A
La calidad la atención
El producto me gusta lo que pasó me mandaron uno de 3000s y el que pedí y pague fue el de 5000a no se que se pueda hacer gracias .lo que me preocupa es el tiempo me dicen que mi reseña v a tardar unos para darme solución pero si pasa del tiempo para la devolución que voy hacer hracias ya tiene más de 15 días que hice la devolución ,todo en empaque original como lo recibí y no se ha hecho el reembolso en cuanto tiempo de me hará el reembolso ya tiene 30 días y dice que voy a la mitad del roceso y no pasa de allí en cuanto tiempo se me hará mi reembolso para poder comprar otro arrancador gracias
Trustpilot
4 days ago
1 month ago