GOOLOO GP4000 Jump Starter Pack, 99.2 Wh/26800 mAh*3.7 V Battery Capacity, Start Up to All gas/10.0L Diesel Engine, with A Free EVA Box, Jump Pack

This thing did a great job but recently no longer charges. If its been off charger and I hit the power button it turns on but wont jump anything and wont charge now. For the 125 I paid for it, it should've lasted longer.Bought it May of 2023 and probably used it 10 times. ???? wish it had longer leads too.UPDATE: Im upgrading my review to 4 stars for awesome customer service! GOOLOO reached out to me and sent me a brand new jump box kit. I thought I was stuck since I bought it back in May of last year but they have an 18month warrantee, which of course I didn't read. Kudos to companies that still take care of their customers. I am a happy man! Will advise long term on this bad boy.

The battery on my truck had died and i had no jumper cables. I had always wanted to try this tool so i ordered it. It arrived within a day and i had a trip to the airport the following day. It came charged so i jump the truck that evening before. Then the day of me leaving for the airport. I had to make an stop before the airpot. So i jumped it again. Then after my trip i jumped it again at the airport. Then i jumped it at the Walmart where i purchased the new battery. So i jumped the old dead battery several times on one charge and it still has 4 out of 4 bars of charge!! I will be buying these as gifts for buddies and as grad gifts. I know probably lame for a grad but they will thank me when they have a dead battery because they do not have to rely on someone else ... MoreThe battery on my truck had died and i had no jumper cables. I had always wanted to try this tool so i ordered it. It arrived within a day and i had a trip to the airport the following day. It came charged so i jump the truck that evening before. Then the day of me leaving for the airport. I had to make an stop before the airpot. So i jumped it again. Then after my trip i jumped it again at the airport. Then i jumped it at the Walmart where i purchased the new battery. So i jumped the old dead battery several times on one charge and it still has 4 out of 4 bars of charge!! I will be buying these as gifts for buddies and as grad gifts. I know probably lame for a grad but they will thank me when they have a dead battery because they do not have to rely on someone else for a jump.

Received the new Gooloo GP4000 today. Unpacked, saw it has 4 of 4 charge bar strength. My truck is a 1997 Ford F250 C/C 4x4 7.3L PSD, and its 6 year old Duralast batteries were to weak to start. Connected the Gooloo GP4000 and truck turned over fast. Started the engine with no problems. The GP4000 was now at 3 of 4 charge bar strength. Charged it up to 4x4 with my PC's GPU usb-c port. It charged to 4x4 in about 20ish minutes. This one test let me know the GP4000 is a beast of a jump-starter. Carefully placed the GP4000 in its convenient carrying case and stored it my truck. I ordered a UGREEN 100W USB C Charger. It should arrive tomorrow. I will store in the same case as the GP4000 for future use.

I purchased this model for my brother and decided to get one for myself. I was hospitalized and that caused my car batteries to all die. It worked great in my Dodge Magnum with a 5.7 Liter V8 engine with a nearly drained battery. The battery was so low that the car didn't give it an adequate charge even after 20+ miles. I ended up pulling the battery out and charge it externally. On my Lincoln, the charger started it no problem but a Lincoln will be a Lincoln and the car was in the repair shop for over a month. This killed the battery again and permanently damaged one cell. The safety of this jump starter combined with the slightly charged but damaged battery made it nearly impossible to start. The safety kept disconnecting despite me pushing the button. The only ... MoreI purchased this model for my brother and decided to get one for myself. I was hospitalized and that caused my car batteries to all die. It worked great in my Dodge Magnum with a 5.7 Liter V8 engine with a nearly drained battery. The battery was so low that the car didn't give it an adequate charge even after 20+ miles. I ended up pulling the battery out and charge it externally. On my Lincoln, the charger started it no problem but a Lincoln will be a Lincoln and the car was in the repair shop for over a month. This killed the battery again and permanently damaged one cell. The safety of this jump starter combined with the slightly charged but damaged battery made it nearly impossible to start. The safety kept disconnecting despite me pushing the button. The only was was to completely disconnect the existing battery for the jump starter to not shut off when the bypass button was pressed.As I said, it's a good feature as someone's that I know didn't have these safety features and caught on fire when he didn't disconnect it while driving after the car started.

A purchase like this typically starts with a dead battery. My car's battery appeared to be drained (and with an older car, that's easy to do). I needed a jumpstarter backup, FAST, so I ordered this GOOLOO and although it was able to successfully start the battery with the GOOLOO, the charge was very brief. The GOOLOO's basic diagnostics confirmed that the battery was essentially dead. The AAA assist guy confirmed the diagnostics -- DEAD battery.I replaced the old battery, repacked the GOOLOO in its storage kit and now keep my GOOLOO in my car for any future jump start needs (mine or someone else's). Ready to go!One of the GOOLOO features I really appreciate is that you don't need LONG connecting cables draped across the car. No more connecting someone else's car ... MoreA purchase like this typically starts with a dead battery. My car's battery appeared to be drained (and with an older car, that's easy to do). I needed a jumpstarter backup, FAST, so I ordered this GOOLOO and although it was able to successfully start the battery with the GOOLOO, the charge was very brief. The GOOLOO's basic diagnostics confirmed that the battery was essentially dead. The AAA assist guy confirmed the diagnostics -- DEAD battery.I replaced the old battery, repacked the GOOLOO in its storage kit and now keep my GOOLOO in my car for any future jump start needs (mine or someone else's). Ready to go!One of the GOOLOO features I really appreciate is that you don't need LONG connecting cables draped across the car. No more connecting someone else's car battery to your car battery -- just position your jump starter close to your car's battery, attach, charge -- go!Another good feature is its ability to recharge your mobile devices. When you can't drive around to recharge your phone or laptop, the GOOLOO may be your backup plan.Tip 1: READ THE AND FOLLOW THE DIRECTIONS for safe connecting and jump starting!Tip 2: I live in an area of seasonal temperature extremes so I'm mindful to not leave the GooLoo in the extremely hot or cold car full time. In those seasons, take it inside and place it near the door leading out to your car for a quick grab-n-go with your GooLoo.Tip 3: Set a reminder to check the GooLoo's charge. The re-charge is not very fast, not very slow. It just takes time. My mobile devices have this reminder set for every three months, or go old school and put a reminder on a paper calendar -- whatever reminder system use -- use it to make sure your GOOLOO is always ready to charge.I'm pleased with the GOOLOO jump starter. It has given me greater peace of mind for my car (and even my mobile gear).

I was very skeptical about this battery jumper. After I got it I was reluctant to even trying it for fear it wouldn't work as described. I know that sounds stupid but past experience with other products made me this way. When I did try it I was absolutely blown away with how easy and perfectly it worked. I got so excited that the experience of jumping a battery was fun. I now look for any opportunity to use it. I saw some guys trying to get their car started with jumper cables. They had been struggling for a while. I walked over with my GOOLOO GP4000 and instantly started their car in the awe of everyone. Love this tool.

I purposely drained my car battery down to about 9 volts to the point the ignition didn't even click.I hooked this up, according to instructions (important) and my 4.2 liter engine fired up as if I had a brand new battery connected!Truly amazing!People here have complained about it not having a wall wort (wall charger) and I have to say that by now, most people have them for their phones, tablets and a slew of other things common in most every house. I think a lot of new phones don't come with them any more. How many does one need? I think I probably have a dozen of them by now.I would suggest however, that if you need to purchase one, get a name brand one of good reputation! Having good circuitry there assures safety and reliability.The GooLoo GP4000 is ... MoreI purposely drained my car battery down to about 9 volts to the point the ignition didn't even click.I hooked this up, according to instructions (important) and my 4.2 liter engine fired up as if I had a brand new battery connected!Truly amazing!People here have complained about it not having a wall wort (wall charger) and I have to say that by now, most people have them for their phones, tablets and a slew of other things common in most every house. I think a lot of new phones don't come with them any more. How many does one need? I think I probably have a dozen of them by now.I would suggest however, that if you need to purchase one, get a name brand one of good reputation! Having good circuitry there assures safety and reliability.The GooLoo GP4000 is rated tops on line. Even above similar jump boxes costing more than twice as much.I now have peace of mind in my trunk!

gooloo 4000a 12v booster/power bank/flashlight.

ii i recently had the necessity to boost a couple of vehicles with it when their batteries were to low to crank them over properly. i attached my gooloo booster and they fired right up in short order. even though the cables are quite small , it still worked well for me. over time i will know better as i put it to the test again and again. being that it is only about half the price of the popular noco booster,of comparable capacity, i would say it would seem to be a good value so far.the fact that it can be used as a powerbank to power and charge usb devices is also a nice bonus..it also has a bright flashlight built into it, which is also handy.it also has a digital display to tell at a glance when it is ready to boost,and the remaining charge left in the battery.

gooloo mp4000

so far this appears to be an awesome jump starter with way more power for the money than most others. ive only used it once to start a 92 audi quattro with a 4.2l v8. It started this engine immediately having seemingly more power than a fully charged battery. I read the reviews and watched youtube comparisons and settled on this one. i have a noco 1000 amp jump starter that is reliable and safe which i leave in my girlfriend's car but this one is more powerful and at 93 dollars is cheaper than the noco. Time will tell if it holds up but for now i would highly recommend it to others. The 12v cigarette lighter adapter is a really cool accessory too that i haven't seen with other jump starters.