Gooloo GT4000S 4000 Amp Fast-Charging Portable Jump Starter for 12V Vehicles

I was looking to buy a jump starter and was leaning towards a NOCO brand but after seeing how much more expensive they are I started shopping around and came across the GOOLOO brand so after some research I decided to give it a shot and I couldn't be happier that I did. This jump starter costs about a third of the price of similar ones from other brands but works amazingly so far and does everything I need it to do with zero issues. I am glad I discovered the gooloo brand and would love to try some of their other jump starters and products in the future if given the chance.

I have a couple of backup riders in case my main mower is down. It gets expensive to keep batteries in all of them, and with this rig I can go crank them up from time to time without having to drive my truck around and getting out the jumper cables. I've already used it a couple of times and it's just down to 96%. This thing is great!

My car (2008 sedan) battery was completely dead about 4 days ago (Friday), so I did some research, narrowed it down (based on the reviews) to the Gooloo T4000S, ordered it online same day, received it 2 days later (Sunday), it arrived already 80% charged, but I went ahead and charged it up to 97G%, the car fired right up, hopefully it was just a dead battery. What a feeling of independence and a great product. So far so good, I definitely recommend this product.

After seeing great reviews of the Gooloo jump starters online, I decided to go ahead and pay a bit more for this model that has the screen and 100 watt in/out capability. I'm very glad that I did. This jump starter easily started a high compression truck engine and absolutely can do 100 watt charging and power delivery. I only have a couple nitpicks that keep this jump starter from being perfect. The first is that the watt rating that it shows on the screen is just slightly (2-4 watts) higher than the device it's connected to, whether charging or delivering power. The second is that it doesn't come with a case. For the price of this one versus other competitive jump starters (excluding Noco), it should come with the case. Other than those, I have had no problems with this jump starter and I love how fast it can charge back up compared to my other jump starters. Before you buy this, you may want to be sure that you have a charger than can supply 100 watts, though. Most USB chargers can only deliver up to about 45 or 65 watts at the most unless it's specifically designed for high draw devices like high performance laptops that get their power through USB C.

The tow truck driver used one on my car %26 had to have one for myself. Worked better than jumper cables. May get a second one later for my truck. everyone should have it.

Fast shipping. Arrived almost fully charged at 75%.....which is normal. Package accessories include cigarette lighter charger which charged quickly. Have yet to test unit as boost charger, but everthing appears good to go.

love this does what is suppose to do and doesn't disappoint would recommend having this in your car I've helped people in need of a jumpstart and has not failed me once

So simple to use! Has bright lcd display, easy to connect jumper cables, can even charge your phones or other devices with it. Even has a super bright flashlight on the end of it. The only thing I don't like but it's the same with anything you seem to buy these days is that it can charge in your house using a simple USB charger. And it doesn't come with a USB charger. But other than that this boost pack is simply fantastic!

Solid product. Got a a back up for my boat cranking battery and worked great even started it with no battery connected.

The unit that I arrived to my house was defective. the battery inside was loose and was concerning me cuz I didn't want this battery to blow up on me so I returned it. it was defective from the box. nothing to do with delivery. delivery was fine. the box didn't look damaged. I think the product just came defective. I cannot say how good it is because I didn't try it. I was afraid about the battery. it was loose inside the case. that's why I returned it. maybe in the future. I ordered this one again. when the price gets more reasonable. maybe about $69.99. I'll buy it again