A11 Portable Jump Starter 4000A 12V Lithium Car Battery Booster Pack Blue

what our customer say this product:

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1. st9er4life Verified Buyer – 8 July 2024

   I disagree with some who say that this product doesn’t work on a completely dead battery. I purchased this in early 2021 and It has worked every single time I’ve had to use it on both of my cars. I have used it to jump start other folks vehicles as well and it works great. I have two cars one of them I use as my primary work vehicle and my 2nd vehicle mostly for leisure. I sometimes alternate between the two for work, but if I let either one set for an extended period without starting them the battery gets really low or dies completely. I pull this out hook it up and they start a majority of the time from the first jump start. There’s been only a hand full of times where it would take a second jump. Bottom line it has proven it’s self over and over I no longer need to ask for a jump start from total strangers. I bought this same one for my daughter to have in her car. My neighbors have bought this as well after witnessing me use mine. After making the purchase and having to use it on their vehicles they always thank me for recommending it to them and tell me just how much they love it, and how they no longer have to ask strangers or wait on a tow truck if no one is around to help them with a jump especially at night. I can’t speak for those who may give this jump starter a negative review but It is a great buy at this price.

   

2. BenjS1 Verified Buyer – 29 August 2024

   A gadget so small (hardly bigger than an old brick phone) can pack so much power. First day I had it my neighbor asked for a jump. I handed him the box, telling him I never used it. He laughed and said “I will try, but this will never work.” WIthout any strain whatsoever, it cranked over his F350 truck. He hollered to his wife who started the truck “Do you even believe that?”

   My car has sat for weeks at a time, which was the reason I bought it. It was totally dead, to the point even the unlock on the remote would not work. No lights, nothing. I hooked this thing up and it started immediately, cranking over very rapidly. I bought this on a whim because I had been given some gift cards. It just may be the best ezysurvival.com purchase I have ever made. It is an absolutely amazing product. For those on the fence – take a leap, you will not regret it.

   This is NOT a bogus review. This was a bought and paid for item. I rarely review and item – only if it horribly fails or far exceeds my expectations. This one is a winner.
   

3. Gregory A Louderback Verified Buyer – 7 October 2024

   It didn’t come for 18 days and I told several different representatives multiple times to cancel the order but the charge wouldn’t clear from my debit card. I bought a new Die Hard battery from a local Auto parts store and weeks before it came. I eventually got a $1 credit for my waiting for it and I finally got it. I have used it to help others 3 different times. It’s really easy to use and started their car’s within seconds. It still had a 85% charge when I recharged with a C charger within 30 minutes when I checked it. It was well worth what I paid for it but I don’t think it was worth the wait when I could have gotten it locally without all the aggravation.
   

4. jose Isidro ruiz ramirez Verified Buyer – 22 October 2024

   👍
   

5. Justin L. Copeland Verified Buyer – 4 November 2024

   This thing has come in clutch so many times. Not just as a jumper but as a huge power bank.

   When Helene hit and we had no electricity for a week or 2 and nothing else, this kept my devices charged to keep me connected.

   This device actually was not in my possession for the longest because other people needed it for their cars more than I was needing it.

   It is extremely portable and very durable.
   

6. Evan facey Verified Buyer – 15 February 2025

   Bought this battery jumper in 2021 As you can see from pictures this has started many vehicles jump. Will jump v8 engine. I’ve even been using this as a backup charging station for phones laptops and more .. trust buy one

   

7. Dustin TheWind Verified Buyer – 19 February 2025

   The holding case is only included in the 2000 and up models, not the 1500 so if that was something you wanted, don’t be misled like I was. I saw pics of the case but didn’t realize that it’s only for the mid and high tier, not the least expensive version. Makes sense and it’s my fault I didn’t catch it. Just wanted to let others know up front.

   As far as the unit itself it came charged, display is easy to read, and is nice that it doubles as a charger for other things like phone, switch, vape batts, etc. and not just vehicles. As far as how long it lasts, how many charges of what, or car starts I can’t say. Just got it today but I’ll edit this review when I know more about how it performs.

   I’ll be keeping it in a lipo safe bag while being stored in my car for safety. But with literal negative degree temps coming right around the corner, it’s really nice to not have to worry about a dead car when it’s the most cold outside. This should keep me up and running in no time.

   I docked one star for the flashlight feature. See the video for its crappy nature. The solid light is ok at best. It’ll work in a pinch but the strobe is sporadic and random but it is technically flashing but not a strobe flash. And the “sos” is marginally worse in its random flashing. It’s not SOS or Morse code *anything* just janky random flashing.

   Will it get attention on a dark road at night? Sure. Will it express “emergency”? Not really.

   Seems to be a good value for the price but time will tell.
   

8. Matt the Shopper Verified Buyer – 22 April 2025

   I’ve had a bad habit lately of leaving my dome light on in my car and the Prius is such a pain to jump that I wanted a way to do it by myself and not inconvenience others. This was able to jump my car. I received the item and plugged it in to charge only to find it was already at 100% This made me nervous thinking it was a returned unit or somehow not working correctly, but I hooked it up to my car using the VERY poorly written directions, and was immediately able to get the car to “turn on”. However, if you are trying to jump a hybrid or Prius specifically, it may take a few tries, as the unit continued to cycle and the car would turn on and then die, turn on, and then die, without the engine ever turning actually engaging (just dash lights, fan, etc). I don’t know exactly what was going on under the hood but at one point the unit flashed green and red quickly, so I unplugged everything and tried again. Same start and stop occured a few times and then the car started and stayed turned on. I assume the car needed a little extra juice that the quick jolts from this unit just weren’t supplying enough of but after a few it had the job done. As seen in my picture, the process took the unit down to about half battery, so I would say realistically for a completely dead hybrid battery in my experience, this may get you two jumps, maybe. At the end of the day the product worked and the car is currently running and the 12v battery will be charging itself over the next few hours!