GOOLOO GT3000 Jump Starter 3000A 100W 2-Way Fast Charging, SuperSafe 12V Lithium Portable Car Battery Booster Pack, IP65 Power Bank Charger Box with Jumper Cables for 8L Diesel and 10L Gas Engines

Last year the battery on my wife's car left us stranded and a nice lady offered us a jumpstart with her small gooloo jumper, it worked surprisingly well to start my wife's Highlander with a V6 engine. She gave me the name of it and immediately looked it up in Amazon. I ended up ordering a larger unit because several of my cars have a V8 and they often times sit for months at a time without being driven. Those cars a parked in another lot and trying to use another car to jumpstart them is not easy. This unit makes like so much easier. We also use it as a power bank to charge cell phones when we're out at the band competitions, the built in light is bright and makes for a nice backup light and power source when the power goes out. I keep it with all the accessories in a plastic ammo box and I also ordered the 12v female cigarette lighter/ power port (not included)along with 6 USB port fast charger to charge up to 6 phones at once. This does come with a 12v cigarette lighter quick charge cord that allows you to recharge the jumper unit in about 20 minutes instead of 60 minutes via the USB port. Very happy with this until. I have now owned it for 1 year at the time of writing this review.

This is the best jump start box I have ever owned and I have owned quit a few. I’ve used it numerous times over the last two years on lawn mowers, diesel tractors , diesel trucks and vehicles, even a few pieces of heavy equipment with no problems . I have jump started vehicles that have been sitting for 10 years are more and it cranked them like a brand new battery was in it. I now have purchased three of these GT 3000 and I am going to purchase a GT 4000 one day. I have one in my vehicle, one in my truck and keep one in my shop. I will purchase another GT4000 for my son to keep in his diesel truck too. But I’ve read a review that-if you do buy a GT4000 do not use it on lawn mowers or anything with small starters because it will destroy a small starter, but I don’t know this as a fact, just be aware. I loaned one of my jump starters to my neighbor and he broke the negative cable clamp somehow which I don’t understand because this clamps are very heavy duty, strong clamping power and the cable it self is 8 gauge wire and very flexible, not cheap at all. So I went to the support tab and ask where I could get a replacement clamp and it was no problem either the company or Amazon is sending a new one free. So support is very good, thanks Gooloo.

I have been using this version for the past 2-3 years and it has been a great jump box. I have a newer version that stopped working and the company sent a replacement without hassle which led me to want and create a review. This is company makes great products and stands behind them. Highly recommended.

Outstanding jump starter that has worked like a champ every time its been needed. I've owned this for over 2 years now and every time it has been needed it has done exactly what you expect. Its very easy to use, just connect, wait for ready to show and start your car. This has been plenty powerful to jump start a Kia Soul, Nissan Pathfinder, Chevy Suburban and Ford Explorer over the years. Including jumping the Suburban and Explorer 3 times in the same day without recharging. Also nice having the 100W USB PD output, that has saved my laptop several times I've forgot to bring a charger. I liked it so much that when a friend "borrowed" it and it didn't come back I went ahead and replaced it with the same brand.

Only have had to use it once for a jump start. It worked when needed. Holds it's battery charge for a long time. Recommend so far so good.

UPDATE 2/1/23:I left my “less driven” Ford Fusion parked for 8 months. I expected I would need my GooLoo. Opened the box and the GooLoo was still at 100% charge, even after 6+ months. After some efforts to just get inside the car to open the hood, I attached the booster, dead battery , so I pressed BOOST. The Ford spun very fast and started right up! Then, it stopped running and I heard the GooLoo beeping. It was in a current overload state. I reset the GooLoo and started the car, 10 seconds later, it stopped again and the booster was beeping. Over heated, needing 10 minutes to “rest” and reset.So, I attached traditional booster cables, and discovered that the Ford battery was COMPLETELY DEAD, no voltage and no spark! I let my new car “charge” the Ford for about 30 minutes. I went to start it, and it turned over much slower than when I boosted it with the GooLoo, but this time, it remained running.CONCLUSION: The GooLoo is not designed to “charge” a dead battery. (No surprise there.) But, I was really shocked at how well it worked, even with a totally dead, zero voltage battery! I’m more impressed now than I was before.As I write this update, I’ve got the Ford charging and I will be driving it later today. DURING THIS EVENT, THE BOOSTER DROPPED TO 93%, still enough to boost a few more times!I’ll charge the GooLoo back to 100% and put it away for the next time it’s needed. Excellent purchase and excellent value!————————————-ORIGINAL REVIEW:I’ve been a diesel mechanic all my life, migrating to technology systems engineering decades ago. 2 months after we purchased a high end luxury SUV, we went on an extended cruise. 10 days later, we returned to our SUV at LAX. Yes, dead battery! (Another story as to why!)I was naked with no tools, volt meter, or any way of diagnosing the status of the battery. 2 hours later, after 3 separate roadside service attempts, we were finally running and on our way home.I NEEDED A SOLUTION, ON BOARD, FOR THIS PROBLEM! Something I could leave in the car, just in case. After much research, I selected this higher amperage Lithium Ion type of portable booster.Coincidentally, 1 day after receiving this GooLoo booster, my next door neighbor left their SUV, not driven for 2 months, run down its battery.I tested the GooLoo 3000 GT on it. The battery had drained to 7.5vdc (dead battery). Using boost override, overheating, 10 minutes, boost again, reset, boost again, and finally, after the GooLoo had “charged” the battery sufficiently, the big SUV started. 25 minutes later, there was about 30% remaining in the GooLoo! I then put my standard battery charger on the car to charge overnight.So, it really works! Having the actual booster battery status is a real advantage as well. I now carry the 3000GT with us when we travel, just in case.I use a 65 watt type C USB wall charger with a high quality type C USB cable, (both ends), and it will charge the 3000GT in about 3-4 hours from 0%. It will stay fully charged for weeks, and because of the status display, it’s easy to check the internal battery status before each trip.Technology advancements make this an amazing value and solution for “jump starting” today’s high current demand vehicles. Our problem was a parasitic current draw that was undetected when the SUV was driven regularly. The GooLoo 3000GT is part of my tools for just such emergencies. I’m purchasing a 2nd unit for my other car. No more jumper cables for me.