MEGAWISE 2500A Peak 21800mAh Car Battery Jump Starter (up to 8.0L Gas/6.5L Diesel Engines) 12V Portable Power Pack Auto Battery Booster with Dual USB Outputs

MEGAWISE 2500A Peak 21800mAh Car Battery Jump Starter (up to 8.0L Gas/6.5L Diesel Engines) 12V Portable Power Pack Auto Battery Booster with Dual USB Outputs
Price: $54.41
(as of Jan 27,2026 18:56:17 UTC – Details)

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Customers say

Customers find the jump starter powerful and easy to use, with the ability to start engines on first attempt. They appreciate its compact size, versatility, and consider it well worth the money for emergency situations. The battery charge performance receives mixed feedback – while some report it charges up to 100%, others mention it loses charge shortly after use.

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270 customers mention functionality, 226 positive, 44 negative

Customers report that the jump starter works effectively, starting cars and bikes on the first attempt.

This works great. Only issue for me it doesn't come with an outlet charger. Does come with a USB cable which you can charge it. Easy to use.Read more

…was dead ( WFH) , but today I finally got to use my jump pack , worked great . Not the usual low battery start when you use jumper cables ….Read more

Comes with everything as shown, easy to use and works well, the case is built well an is great protection for the jumperRead more

…Very easy to use and reliable.I had to get one for all my vehicles. I think your would be crazy not to have one for all your family members.Read more

227 customers mention quality, 226 positive, 1 negative

Customers find the jump starter to be a high-quality device, with one customer specifically noting that the cables are also well-made.

…Dads car was a 2003 v6 but like I said it was completely dead. Great product and I want to thank Jenn for helping me with the questions I had!Read more

Good product I haven't had a reason to jump start yet but used it to charge my phone. And who said small things can't handle big jobs….Read more

Excellent product. I have used it in multiple occasions to jump start my vehicle and it worked flawlessly. I do recommend buying this product.Read more

Product looks to be good quality but I'll know better when I actually need to use it to start my car. It does not come with charging adapter….Read more

151 customers mention ease of use, 151 positive, 0 negative

Customers find the jump starter easy to use, appreciating its simple hookup and straightforward charging process.

I like this product because it will be easy to use. It fits under the drivers seat which keeps it out of the way but convenient to use if necessary.Read more

Very easy to use. Very quick setup. Much better that using another car to jump your battery. Thames less than 2 minutes. Holds a charge for months….Read more

I like the ease of use and the convenient carrying case, plus it got it’s use on day one and worked like a charm!Read more

…It has twice saved my bacon already on my car's dead battery. Super easy to use. VERY powerful. Better than any heavy charger or jumper cables by far.Read more

104 customers mention compact size, 97 positive, 7 negative

Customers appreciate the jump starter's compact size, describing it as amazing and powerful.

Thing works perfectly, it’s compact, has a nice case with it. Easy to charge with usb-c cable. Great to have with you especially on long car trips….Read more

…dead car battery instantly, charges with a usb or high speed usb, very compact and solid and charges my phones and tablets easilyRead more

…The product works like a charm. Its compact size makes it ideal to carry in your trunk. Their Customer Service support is excellent….Read more

Super compact and easy to use. Perfect for quick jump starts….Read more

98 customers mention value for money, 88 positive, 10 negative

Customers find the jump starter to be well worth the money, with one customer noting it serves as excellent insurance against a dead battery.

Great Price Great Product Great service You cant lose Order One Now!…Read more

Purchased recently – Prompt Shipping and a good price….Read more

Product is a good value. I've purchased other items from this company before and am happy with them….Read more

Great product for the price. Megawise service rep Lyn was great and helped get my warrant registered!Read more

60 customers mention versatility, 60 positive, 0 negative

Customers find the jump starter versatile and handy, with one mentioning it's particularly useful for starting their Jeep.

…I REALLY didn't want those! The padded case is nice – convenient and protects the battery….Read more

Versatile and easy to use compact. Fits nicely into my truck console. Love it. Bought one for my daughter too.Read more

Intuitive interface and very convenient as it is portable.Read more

My friend has one and I had to order my own. Very useful and no need for a call to AAA if its only a battery issue….Read more

59 customers mention power, 56 positive, 3 negative

Customers praise the jump starter's power, describing it as a powerful unit that provides plenty of energy for starting cars.

…This thing is awesome, small, lightweight, but powerful!! I also like that I can now use it to charge my iPhone, etc….Read more

Compact size with lots of power. Easy to charge, easy to carry with you and use when needed….Read more

…Super easy to use. VERY powerful. Better than any heavy charger or jumper cables by far.Read more

…It seemed to have plenty of power I use some big 8 cylinder trucks no problem and the flashlights in the USB ports on the side are just a bonus….Read more

135 customers mention battery charge, 90 positive, 45 negative

Customers have mixed experiences with the jump starter's battery: some report it charges up to 100% and starts dead batteries instantly, while others mention that it will no longer charge or loses its charge shortly after use.

Easy to use. Versatile. Holds a charge.Read more

Used it one time and it would not recharge. Cheap price and cheap product.Read more

It was quite easy to charge up a depleted car battery….Read more

I liked how it started my dead car battery right out of the box with one blue light showing.Read more


Powerful and strong

5 out of 5 stars

Powerful and strong
Excellent jump starter. Exceeds my expectations, really powerful and strong. My neighbours sometimes even ask me to help jump start their vehicles, probably it is time to share the link with them! The case is like EVA material, really great and feels durable.

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Top reviews from the United States


  • Reviewed in the United States on January 18, 2026

    I had this for a few years now and it still going strong , a very nice unit. I would buy again.

  • Reviewed in the United States on November 29, 2020

    Ok, I don't write reviews almost ever. Maybe I should more.. But with this, I had to give it it's due respect. I have a 2007 dodge ram that for some reason no one can find, draws power while it's off, so that even new batteries die in like a week if I don't drive it (my main is a 2020 dodge charger scat pack. I don't use the truck much, especially these days). But anyway, I suffer from mitochondrial disease. I'm exhausted 24/7. Even small tasks can be overwhelming for me. So sometimes it can take weeks before I have the strength or impulse enough to jump charge the truck if I let it go too many days. It's just one more thing on my plate. But on black Friday yesterday, I saw an ad for a different charger, and I thought hmmm, do these work? This would be great if it worked! Anything that makes any task easier for me is so deeply appreciated. Anyway, I didn't trust the reviews on the other one so started looking at others. I was comparing battery, output, features and price. This unit here has the best of them all. And on black Friday for just 50 bucks! And that deal is still active currently as a cyber Monday deal. If you're in the market for one, get it. Don't hesitate.

    Ok I know I'm a bit verbose. It's just me lol. But long story short, this came today. Already had 3 of 4 charge lights lit. So I said heck with it, let me give it a shot. Went out to the truck, popped the hood, connected clamps, turned the key, and within 2 or 3 seconds, bam! Started right up! Was so easy! I couldn't believe this relatively small, flat unit could do it so effortlessly on my 5.7 liter dodge hemi ram. 30 seconds start to finish. I was in heaven! Was so excited I rushed in the house and praised the unit to my boys, as if they cared hahaha. But for me, the little things mean a lot. For this thing to work that easily and confidently, well, the truck battery is no longer something I feel on my shoulders. This unit is so portable it will forever be so easy to start that damn truck up now. One of my favorite purchases I've ever made on Amazon (believe me, I make A LOT of purchases on Amazon lol), and one of the best values overall for price to function ratio. I'm thinking of buying a few more to hand out as gifts! Who couldn't use this in their glove box or whatever? Seriously!

    Oh, I charged my galaxy note 9 on it too once I got inside. Fast charge and all, so that's awesome too! I then charged the unit and in a few hours it was 4 solid dots. So everything worked as expected, and worth every damn dollar of that 50 bucks.

    So like I said, if you're in the market for a jump pack, end your search and analysis here. Add this sucker to your cart and know that your vehicle will be started in a blink of an eye 🙂

    11 people found this helpful


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  • Reviewed in the United States on March 18, 2022

    I bought this to have peace of mind after seeing a friend use a similar one.
    It comes with a nice (very nice) sturdy case, it feels very well built and works as described. My friend bought one as well after seeing mine and he owns a landscape company, using his at least 3-4 times per week on different equipment. I did have a charging issue after having it for 1.5 years (I bought mine here in Dec of 2020. Even though I knew it was out of warranty I went to the Megawise website and chatted with one of their customer service representatives. They could not figure out why it was only charging 2 bars vs 4.
    So, they mailed me a brand new one. No Charge! And no, I did not have to mail my original back.

    That is why I said if you are here reading this, what are you waiting for? Order one! If for any reason you are unhappy they will refund your money and you can keep the device! It even stated this on this page selling it above.

    I love mine and I bet I have gotten 10 others to buy one after jumping people at the gas station, grocery store, etc. Everyone that sees it wants to take a pic and says they are going to get one.

    Great Price
    Great Product
    Great service
    You cant lose

    Order One Now! You wont be disappointed (if you are they will give you a refund)

    3 people found this helpful


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  • Reviewed in the United States on March 4, 2021

    Came On Time and was well packed with no damage when arrived. Upon Inspection, the storage box that this starter device stays in during non use is very nice and sturdy. One could drop this item and i am sure it would not be affected with all the foam inside the storage plastic box.
    As for the use of the Starter Device, It took a Full Charge with no problem using my C- Type Charger that came with my I Pad 11 and I tested the light (Remember to hold the button down for a few seconds to activate it) and its ability to charge up Phones and I Pad's and it does this with ease. I have not had it long enough to have needed it to actually Start a vehicle, thus not able to give it a higher rating for now, but, i will come back on after i have used it to start a vehicle and write another review with those results. For what I have examined and used the Starter Device for at the moment, it works great.

    2 people found this helpful


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  • Reviewed in the United States on January 5, 2026

    Car battery depleted during a cold week, this helped me start it in 3 minutes. Easy to use, lightweight, and a must to have in the car for emergencies.

  • Reviewed in the United States on October 1, 2025

    Love this one. It's compacted and gets the job done.

  • Reviewed in the United States on October 17, 2024

    Original review:
    I was excited by the low price and good reviews of this product. When I took it out of the package, it felt very light. I have lots of lithium batteries around, so decided to weigh the jump charger and compare it with some other lithium batteries I have. It weighed just over half of an 8,000mAh battery, and less than a quarter of a 19,600mAh battery. I decided to open it up and investigate!

    To my disappointment, I found that my 21,800mAh jump battery only had a single battery pack rated at 3,700mAh. I also found that the battery pack was manufactured in April of 2023! So, my brand new jump battery was made using a battery that is a year and a half old! Take a look at the picture I posted of the internal battery.

    I should have bought something more reputable. I am now waiting on a Gooloo jump battery.

    Update as of 10/23/24:
    I was hoping the manufacturer would weigh in about the fake advertised capacity, but I have not heard anything. I did use the jump battery with our vehicles several times. If the car battery is strong enough to run everything in the car, but not strong enough to start it, this jump battery works fine.

    If the car battery is very low, this has no chance of starting the car. We had to pull out the jumper cables for those. So, I guess I got what I paid for. I definitely won't buy this again.

    Customer image


    1.0 out of 5 stars

    Fake capacity – only 3,700 mAh, not 21,800mAh as advertised – Updated 10/23/24

    Reviewed in the United States on October 17, 2024


    Original review:
    I was excited by the low price and good reviews of this product. When I took it out of the package, it felt very light. I have lots of lithium batteries around, so decided to weigh the jump charger and compare it with some other lithium batteries I have. It weighed just over half of an 8,000mAh battery, and less than a quarter of a 19,600mAh battery. I decided to open it up and investigate!

    To my disappointment, I found that my 21,800mAh jump battery only had a single battery pack rated at 3,700mAh. I also found that the battery pack was manufactured in April of 2023! So, my brand new jump battery was made using a battery that is a year and a half old! Take a look at the picture I posted of the internal battery.

    I should have bought something more reputable. I am now waiting on a Gooloo jump battery.

    Update as of 10/23/24:
    I was hoping the manufacturer would weigh in about the fake advertised capacity, but I have not heard anything. I did use the jump battery with our vehicles several times. If the car battery is strong enough to run everything in the car, but not strong enough to start it, this jump battery works fine.

    If the car battery is very low, this has no chance of starting the car. We had to pull out the jumper cables for those. So, I guess I got what I paid for. I definitely won't buy this again.

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    Customer image

    9 people found this helpful


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  • Reviewed in the United States on January 24, 2026

    Buenisima



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Product Summary: MEGAWISE 2500A Peak 21800mAh Car Battery Jump Starter (up to 8.0L Gas/6.5L Diesel Engines) 12V Portable Power Pack Auto Battery Booster with Dual USB Outputs

From MEGAWISE
Super Powerful – Jump start your car in a flash: true 2500A peak enough for virtually all personal and commercial vehicles up to 8L Gas and 6.5L Diesel Engines in seconds. 21800mAh battery capacity when fully charged will hold enough power within 6 month to jump start. Suitable for all car, truck, motorcycle, boat, RV or tractor ATVs, UTVs, lawnmowers, snowmobiles, etc, even in extreme temperature(-4°F~140°F). Superior 10C battery built to last for years. 21800 true capacity to last long.
Multiple Purpose & Fast Charge – Type-C in(out) port, Quick-charge 3.0 USB port, and innovative charging technology combine to deliver a blazing-fast charge compatible to almost all electronic devices such as phones, tablets, cameras, kindles, etc. A 5.5/2.1 port 12V DC output.
Easy to Operate – No need to be a technically savy. Connect smart clamp included to device, clamp the clamps to car battery, turn on device, then start your engine. 2180mah t jump start after 6 months with low energey loss when not in use.
What’s Included – 1 MegaWise Ultra-Compact Automotive Jump Starter, 1 Smart Jumper Clamp, 1 USB to Type-C Cable, 1 Bonus Heavy Duty Carry Bag, 1 User Manual.
MEGAWISE Quality & Support – MEGAWISE designs and manufactures products with the methodology of LEAN (adopted by Famous Brands such as Toyota and GE). 24/7 Live Chat Support will confidently back up the product with money back guarantee.

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