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WOLFBOX

WOLFBOX 4000A &88.8Wh Battery Jumper Starter Portable(10L/10L),with Booster

Based on 6,189 reviews
Condition: New
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$119.99
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 31
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At a glance

Condition
New
Size
4000A
Model
MegaVolt24
Dimensions
1.5"D x 3.86"W x 9.33"H
Weight
3 lb
Voltage
12 volts
Vehicle Service Type
Passenger Car
In the box
MegaVolt24 Jump Starter

Features 5

  • 4000A&88.8Wh Jump Starter - Megavolt24 is equipped with a powerful 88.8Wh battery. this car battery jump starter is well-suited for 12V vehicles like cars, trucks, boats, and larger vehicles. wolfpack effectively restores your vehicle's power in emergency situations, supporting both gasoline and diesel engines with a capacity of under 10 liters
  • HD LCD Display - The LCD screen offers a transparent presentation of all the status indicators for the car jump starter portable supply. Easily observe the current condition of your emergency power source, enabling smooth access to all functionalities.
  • 65W USB-C Quick Charging - Featuring 1 * 65W Type-C in/out port, 1 * QC3.0 USB-A port, and coming with a PD65W fast charger, our jump start battery pack source can be fully charged in just 1.3 hours. Equipped with two output ports, it efficiently charges various electronic devices such as phones, laptops, and iPads, making it a perfect choice for travel or camping.
  • One-Touch Booster and LED Flashlight - This jump starter features a one-touch boost function for starting vehicles under low voltage. It also includes an LED flashlight with SOS, strobe, and high-beam modes, serving as an essential emergency tool.

Specs 22

Brand WOLFBOX
Battery Cell Composition Lithium Ion
Voltage 12 volts
Product Dimensions 1.5"D x 3.86"W x 9.33"H
Vehicle Service Type Passenger Car
Battery Type Lithium Ion
Compatible with Vehicle Type Passenger Car
Battery Capacity 6000 mAh

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If you place your order now, the estimated arrival date for this product is: Saturday, Oct 31

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Similar Products

Top Amazon Reviews

Even better than I expected!
Size: 4000A
I have a Honda Element that I don't use much, and consequently the battery is always running low (especially if I forget to put it on the trickle charger). I've been caught a few times where it will act like it's charged and start up the first time, then after I've driven it to my destination, it won't start again when I need to drive back home. So I needed some insurance. I decided to buy this Wolfbox after seeing it tested, with very favorable results, on the Torque Test Channel. Even so, I was skeptical that such a small box could actually start a car engine, when the car's regular battery weighs like 25 lbs (small for a car battery, but still). But I tried it with a "mostly dead" battery (enough that the power locks worked but it chugged maybe 1 time when I tried to start it). It was night time so I turned on the integrated light on the Wolfbox - plenty bright enough and well positioned to see what I needed to do to hook it up. It took less than a minute to hook up, including finagling the hood open - way easier than dealing with jumper cables or the plug-in charger. The green START light lit up and I turned the key and the car started RIGHT up. I was shocked - the starter actually sounded like it had more pep than when using the regular battery to start normally. The best part is that I started with the Wolfbox at 100% charge, and after starting the car, it still read 97% full. I could drive the car around all day making multiple stops not worry about it with one charge on the Wolfbox. Also the included charger charges it super fast - it arrived about 70% charged and was charged to full in less time than my phone usually takes to charge (and it has a way bigger battery inside). Speaking of charging, I also used it to charge my phone using the bidirectional USB C port - kept my phone running at 100% using it as a hotspot for a whole afternoon, and only depleted a couple of percent of the battery. So this product gets an A+ from me. We'll see how the longevity is but it can't be worse than the regular car batteries. Which brings to mind a question - why are we still using lead car batteries when this lithium technology is clearly better AND cheaper? ... show more
Reviewed in the United States on April 23, 2026 by zeroryouko
Great!
Size: 4000A
Nice portable size, great case, works fantastic. Easy to use, holds a charge excellent
Reviewed in the United States on September 21, 2026 by Crystal
Wolfbox is a Perfect Product for its Purpose!
Size: 4000A
Unequivocally, my rating is FIVE STARS! I consider the Wolfbox a perfect product for its purpose! I am 80 years and 8 days of age and I had gone outside to run some errands and discovered that the battery in my 2005 Cadillac was totally dead - no interior lights or sounds. That evening I got online to Amazon and spent time studying all of the lithium battery powered mobile jump starters listed there. I finally made my decision to purchase the Wolfbox. No help or advice from anyone in the middle of the night. I first made sure that I had "Free Return" just in case that my choice might turn out to be a bad one. Then I placed my order at midnight. Prime delivered the Wolfbox the next day after lunch. I checked the items in the box, read the instruction booklet and proceeded to charge the Wolfbox up to 100%. Then I went outside, opened the hood of my car and attached the Wolfbox to the car according to the Cadillac operating manual. I followed the easily understood directions from Wolfbox and I got my car's motor started in about ten minutes while standing under the blazing Texas Sunshine in over 100 degrees heat. I disconnected the Wolfbox, hopped in my car and drove away to run my errands with all electrical equipment functioning and the air conditioning cooling me. Wolfbox is so great that I want to star in a TV commercial for the Super Bowl for maximum global coverage that should go viral for Wolfbox's contribution to the empowerment of Women's independence - even in their most senior years! I have always said that Triple AAA is is really Great and is a single girl's Best Friend - but you do have to wait around on their schedule! But with Wolfbox, my new BFF, I had an instant jump that kept me on my schedule with No Muss, No Fuss and No Bother! I am so satisfied with Wolfbox that I will be posting my experience on my Facebook Page! Thank you Wolfbox for a wonderful product that is so well protected in its own case and sold at an affordable price. Wolfbox did for sure design a very useful product that checked all of my boxes for purchase. I am a disabled senior citizen female who is now a Very Happy Camper! Thank you Wolfbox! Thank you Amazon! I wish I had had someone to video me jump starting my car but you will just have to take my word for it! ... show more
Reviewed in the United States on September 5, 2025 by Pat
Great Product but not really a Phone Charger
Size: 4000A
As Jump starter it works for emergencies. It does what it is supposed to do. And it keeps a charge stored just fine So i give it a 5 STAR. However if your on your boat and want to charge your phone, to get to a full charge on your phone takes the WOLFBOX down 25%. Leaving 75%. And that seemed too much of draw to just charge my. Phone. ... show more
Reviewed in the United States on September 28, 2026 by Carl
Reliable Power When You Need It Most – A Must-Have for Every Vehicle!
Size: 4000A
The WOLFBOX 4000A Jump Starter MV24 has exceeded my expectations in every way. I purchased it for peace of mind, but after using it, I can confidently say it's one of the smartest automotive purchases I've made. The 4000A output is incredibly powerful and had no problem starting a vehicle (or boat) with a completely drained battery. What impressed me most was how fast and effortless the process was. The included jumper cables are high quality, and the clear LED display makes it easy to monitor battery status and operating conditions. The build quality feels premium and durable, yet the unit remains compact enough to store in my vehicle without taking up much space. The 65W quick charging capability is another standout feature, allowing the jump starter to recharge quickly and be ready when needed. It's also convenient for charging phones, tablets, and other devices while on the go. I especially appreciate the built-in LED light, which is surprisingly bright and extremely useful for roadside emergencies or nighttime use. The battery holds its charge well, giving me confidence that it will be ready when I need it. What really sets this unit apart is its versatility. Knowing it can handle gas and diesel engines provides tremendous peace of mind. Whether you're driving a car, truck, SUV, or work vehicle, this jump starter delivers dependable performance. Overall, the WOLFBOX MV24 is a powerful, well-designed, and reliable piece of equipment that every driver should consider keeping in their vehicle. It's easy to use, packed with useful features, and has already proven its value. I highly recommend it and would purchase it again without hesitation. ... show more
Reviewed in the United States on October 1, 2026 by Casey Couch
Worth sale $, jumped 2 cars; STEEP curve (no quick start guide, non-spaded prong, clamps too big)
Size: 4000A
[Update: I have added 1 star, raising the rating from 3 to 4, because almost immediately after this posted, the company reached out and refunded my purchase, proactively, without even hearing back from me. That is five-star+ customer service as no onr has ever done that for me. That said, the product still needs an adaptor with a spaded prong, a smaller clamp uption to fit tight terminal spaces in cars like a Checy Sonic, and a quick start guide. But great customer service and a product that worls well if you get past the learning curve and/or improvements needed is worth a 4th star. The rest of this review is unedited (the original 3 star review). Also, with that refunf, I should probably qualify this edit is now as a 'compensated' review, though it was a surprise that came after the original purchase and review and did not influence me except by showing some respect for my experience and comments. That differentiates this company from most.] I had a portable jump starter on my wish list as a 'prepper' for quite awhile. Given the countless times I have needed and used a portable air compressor to air up low or flat tires (for myself and others), I knew it was only matter of time before I'd wish I had more than cables in the car. Sure enough, had to cancel a date recently when I went to the garage to head out and my car was completely dead, no lights or dash or dings/alerts. Ugh. Car was facing into the garage, so a jump from a neighbor's car was not really likely, but my daughter's Cadillac was parked next to mine. I had the keys since she was out of town, but guess what? It was dead, too (had lights and dash, but the ampmeter showed it under 9 amps and it would not turnover, because she's been gone long enough and I'd failed to start it/run it). After calling some neighbors to see if they had a portable jumper or even a trickle charger (nope), I logged into the jungle here to see if my Wirecutter recommendation, the one I'd delayed buying because it was rarely on sale, costly, and did not seem to be fulfilled by either Amazon or the manufacturer (even though it references a Weego store onsite), was on sale etc. Nope. So I started searching the listings and found the Wolfbox 4000 on a good sale, read a LOT of reviews and watched videos, enough that even allowing for some possible 'astro-turfing', I liked what I saw and read from those who liked it more than what I read from those who did not. By the time I ordered it, it was 2 AM, but the cart still said it would be here by morning. When I awoke at 8 AM, it was on my doorstep. Opened it and went to charge it right away, planning to jump the car at lunch. This was where I ran into my first 'snag'... though well packaged and presented, it lacked a 'quick-start' guide, and the manual did NOT explain how to turn it on. Huh? OK, you'd think that is easy, it has a power button and a 'boost' button, that's it. I pressed each, and both, and nothing happenned. So, I thought, crap, is it DOA? Found nothing in the manual I'd overlooked. So, figured it must need a charge to come on. Made sure I had a live outlet (not tripped) in the kitchen and plugged it in to charge. Still no lights or power, so, frustrated, I walked away thinking maybe it needs awhile. Came back two hours later, pressed the power button, nada. So, now I'm ticked. I log back in here thinking, if I cant find a review or video that tells me what I missed, I'm going to have to return it. I started watching demos again and nothing jumps out, until I come across one grainy, shaky quick vid with no audio at all, and I notice the guy does what I did: he presses the button, and nothing happens, but THEN, he presses the button and HOLDS IT DOWN FOR 2 SECONDS: it powers up! OMG. How hard would it have been for Wolfbox to indicate on a quickstart piece of paper that you have to HOLD THE BUTTON DOWN FOR 2 SECONDS to turn it on? I try it, and it comes on at 78% charged. Now, I suspect it may have arrived with that charge, because now that I have watched it charge to 100%, I think it would have fully charged in the time I had it plugged in if it could charge while powered off. Snag #1 solved, after a delay of several hours required to figure this out on my own when I should not have had to. Snag #2: I also blame this on lack of a quick-start slip. My kitchen has outlets with ground fault breakers that do NOT have red/green indicators, and they trip a lot, but I cant tell unless something doesn't work when I plug it in. I had moved this unit out of the kitchen when trying to figure out the power up mystery, so when I plugged it back in to charge, was a bit surprised there was no 'charging' indicator that was obvious. Nothing changed on the display. I walked away and like 30 minutes later checked, still at 78%. Hmm. Reset the breaker, checked again, still no change, waited, no increase. Ugh. But when trying some different outlets again, the way the 65W charger is put together reminded me of a USB charger I got cheap once, which clearly was not made in the USA. It also had the 'swivel prongs' this had and the prongs were straight (no bigger 'spaded' prong for the one side like most US made prongs, which effectively 'snaps' the plug into your outlet when you get it pushed in and keeps it from falling out). So, I first make sure the prongs are fully swiveled out (there is a bit of play possible and figured maybe that can break the circuit). I watched when I inserted it what I think of as 'normally' (with the bulf of the adaptere hanging below the prongs, prongs at the top). As with my other cheap charger, I could see that the weight of the adapter was causing it to come away from the outlet slightly. This happens with bulky adapters that have no wide spaded prong to snap them in and hold them. I had to turn the adapter upside down, with prongs at the bottom, so the weight of the adapter above the prongs pushed them INTO the outlet insted of pulling them AWAY from it when hanging below, and push to make sure it was firmly in place to begin with. THIS completed the circuit, and immediately I saw the green 'IN' light and a 'fast charging' indicator both come on. Within minutes, the percentage rose from 78 to 79, and it was fully charged not too long after. SNAG 2 solved, after another unnecessary delay. Snags 1 & 2 were 'sunk costs' for me, I paid the price of a learning curve I should not have had to, but lessons learned, those issues were now avoidable going forward. The product loses 1 star from me for that and the associated bad initial customer experience and bad first impressions. Put a quick start guide in (with bigger print than the 4 font in your instruction manual) guys that covers these issues. And/or make an adapter with a spaded prong to hold itself firmly into the wall to complete the circuit. Snag 3: Now I am ready to try to jump the completely dead car. Having watched some videos from people who actually used the product and jumped fully dead batteries, I knew the 'boost' would likely be needed to bypass the units limiters and let a full charge into my battery. But first I needed to get it hooked up. I had noticed that the jumper cables connector was a VERY tight fit (as other reviewers have noted), so even though it seemed like it would not fit, I persisted carefully and got it in. This was not the snag, but I mention it, as later, when I took it out, it was also VERY difficult to get unconnected, bad enough that I believe the connection could sustain damage over time unless a light lubricant is used (I have not tried that yet, but am debating what the best alternative there may be). So, I do consder that a slight engineering flaw, but, better too tight than too loose (like with the wall adapter). So I go to clip my battery posts. The cables ARE very short, as complained about by some other reviewers, but if you want compact portability, that just has to be like that, from my perspective, so I didn't mind it. But my 2013 Chevy Sonic LTZ's battery has a design where the posts are recessed to be level with the battery caps next to them. As a result, the car's cables can't even use those fat terminals, they have to use the thin clamping circles to even have room to connect. These big fat alligator clamps in the Wolfbox just did NOT want to fit on my posts in the small amount of space allowed. Now I knew there had to be some angle, some way, so I did not give up, but, especially on the post closest to the front window, which had the least room of the two, it took over a dozen tries to find a 'spot' and an angle that I could get the connector fastened where it would grip and not pop itself off. In that effort, the clamps sort of wore out my old, weak hands (I'm 59 with diabetic neuropathy, shaky hands with little strength or feeling in them). I was not pleased. Nor was I sure that the tenuous grip I had found would hold for long or as the car was trying to turn over. But once I got the second clamp to also 'grab' finally, the indicators clearly showed I had a connection. No lights inside my car came on (I had the door open) and no door ajar alarm, so I knew it would not start without the boost. So, I pressed the boost button. Of course, nothing happened until I tried a second time and HELD IT DOWN (figured by that time, but just testing) which after pressing it a couple seconds, the circuit was made, my interior lights came on and the door ajar alarm was dinging. Got in, boom, it turned right over and started. SNAG #3 resolved, but I am taking a star off for the clamps being too large to get onto the posts of my car battery reliably/easily and too hard to squeeze to get them open. I noticed with the Weego trickle charger, that came with three different connection options: 1 smaller/narrower clamps (which would have obviously opened a lot easier and fit), terminal connectors, and a third option that I am not even sure what it was. In retrospect, that is both very smart and also probably a reason their products cost a bit more; a trade-off is they do not have a carrying case at all (Wolfpack has to fit their accesories in their case). Maybe Wolfpack could make different ordering options where the clamp sizes/types vary and/or a package with all the options (for people using who want to be able to service all types of batteries). I did have to jump the same car two more times before I got the battery back to full life by driving it (I had drained it by leaving some parking lights on, I believe), and my daughters Caddy. and it got the jobs done. Using boost drained it about 8 % each time for my Sonic. It only dropped a couple ticks starting the Northstar 8 cyclinder in the Caddy (and boost was not needed). I did not have to recharge the unit between any of those three jumps. The case is really nice and I am glad to have it in the car. Had my user experience been smoothed by a proper quick-start guide they'd likely have gotten 4 stars from me. The two engineering flaws (the unspaded adapter prong and the alligator clips excessive width and excesssive strength) need overcome for the fifth. But if you are willing to buy it knowingly, I do think this is a good enough unit, especially for the price, to recommend it. The only part I can't review is reliability over a long time. If I have any new issues with it over time, I will edit the review accordingly. One of the next reviewers to come along would serve their viewers well to point out the lessons here, too. Final evaluation, three stars for average overall. Now that I know I will need a trickle charger for when my daughter's car will sit for so long, I'll likely give the WeeGo a try after this experience with a lack of connector variety. ... show more
Reviewed in the United States on August 30, 2025 by WordBird
Small and Mighty!!
Size: 4000A
Purchased this for a car lot and can I tell you don't let the small size fool you as it is mighty powerful!! Had this product for over a year now and bought several bigger jumper boxes in the past where it struggles to jump larger vehicles off. This item will never let you down! Easy to use and the battery last forever! Love that it's so easy to carry around. Perfect to keep in your car in case of an emergency! ... show more
Reviewed in the United States on October 1, 2026 by Kaleb C.
Impressive
Size: 4000A
Works well everytime I have used them.Picture this, your work associates hoods up and there waving you down as you drive past them trying to pretend you didn't see their plight because you know what kind of a pain in the assp it is to pull out jumper cables and set up the logistics just to reach the their battery terminals. Then you have to roll them back up and put them in the way to small bag they come in. Having bad flashbacks just writing this review. None of that bunk with this box..and it's a super charger for all other things that need charging, so worth the money and so quick to start vehicles...get it and give those cables to someone you really don't like ... show more
Reviewed in the United States on August 22, 2026 by John
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