After fully charging the device to 100%, it failed to jump start a 3.5L gas engine after attempts of 20 minutes. I returned the unit and then learned from Youtube that there is this "booster" button which will do the trick. I am kind of mad since I read and re-read the user manual several times. Where is the "booster" button mentioned?
I cannot help but suspecting the quality of the product. If the manufacture could not even provide the simple instructions for simple operations, how could they trained their workers properly to make this thing?
Would not start my tractor or lawn mower the DB POWER PACK was fully charged so I got the old faithful jumper cables out and started my tractor and lawn mower...this power pack. may charge a phone or laptop...I received an email from custmer service and apparently the 24 horse power engine in my lawn mower is too big for this portable CAR jump starter to start...maybe that should rename their product to sell phone or tablet power pack since that's all it will charge
I wanted purchased this product to take on a long trip to charge cell phones, tablets, etc.; however, the power outlets keep shutting off automatically after inactivity of 30 seconds making it completely useless as a power source. Even when the light is turned on, the power still keeps shutting itself off. The charge level of battery was always at 100% during my tests. This shutoff problem/feature is not mentioned anywhere in the amazon description or in the user manual (which I did not receive and had to look up on line). A truly bad design flaw. I contacted the company and their representative basically said sorry, not sorry; you'll have to return it. I'd give it zero stars if I could.
Product claims to be able to jump-start a battery in a small 4 cylinder car. But it doesn't help at all. It doesn't have enough power. This product is a waste of time and money. It doesn't work.
I carefully chose this product, because its description said it could jump-start the battery in my Honda Civic. The battery is only a few years old. The battery wasn't completely dead. The radio played and lights worked. But the battery wasn't strong enough to start the car (in mild 60 degree weather).
But this product completely failed to provide the little bit of extra power needed to start the car.
The seller/manufacturer claims, that it can help jump start a small 4 cylinder car battery, are False.
Don't waste your time or money on this if you need to jump-start a car battery.
UPDATE: Contacted Customer Service and informed them about the faulty device I received. Tina, offered steps to troubleshoot the issue, but didn't work. She then offered to replace the device at no charge, but I need something ASAP so I declined and requested for a refund instead. Refund was issued today, and I'll go purchase a different one locally. I'm satisfied with the customer service they have, but not so much the device. So I'll up my rating from 1 to a 3, as the rating is really for the device and not customer service anyway.
I really wanted to love this product. My 4.7l vehicle battery dies out a lot quicker lately because of the winter cold temperatures. I always have someone come jump my battery when it dies. I decided to order this because of the reviews, but I must've gotten a faulty one. IT DOESN'T WORK! When I received the item, it was at 74% charged. I then charged it to 100%. Flashlight works, charging devices seem to work okay, but jumping a car DOESN'T work. I'm so glad I got to try it before going on a long road trip, and having to rely on this in case of an emergency. Purchased it to jump a dead battery, not to charge my iPhone and tablets. It's useless to me if it can't be used for the main purpose it's meant for. I'll be contacting the seller for a refund. I'd rather not waste my time with this and purchase a different one.
This thing is so safe! it prevents electricity from coming out the plugs and conveniently made an annoying beeping noise to tell me it was protecting me!. This way i can not electrocute myself!? thanks technology!
On the bad side, It also does not give output power making the object a useless buzzer. I did not try the usb charger as i don't need that function it i bought a car jumper not a usb power stick. it may work great as a flash light and usb charger but the jumper cable power was a complete fail due to some over zealous safety circuit. Older style non-'safety' types work fine. maybe it works on some modern technological nightmare bmw or Mercedes car but not for my basic electric needs on plain-jane non-circuit wizardry stuff! small easy to return!
Initial review - This product does not work. - The problem with the product is easy to describe, It just does not work. the product looks great, I like the package and it arrived on time but it did not jump-start my car. I made sure it had a full change and tried at least 5 times, I read the instructions carefully it just did not work. Maybe the one I received was defective. sorry, I don't like to leave bad reviews but this product does not work.
UPDATE - 7/23/2018 - The Seller contacted me and apologized for the defective item, they sent a new unit for me to try again their product, I have not been able to try it again and I don't know when will I have the chance to do so (I just purchased a new battery for my car) but the fact that they where concerned about my problem and where quick to help counts so I'm changing my review to 3 stars. I forgot to mention the cables are too short.
I bought this pack for 2 reasons, 1) to start a car after 2 weeks in a parking lot and 2) to provide power for lighting. Test results so far 1) car did not get stuck yet, and 2) lights died prematurely, way too prematurely. The vendor claims 18,000mAH, well I tested it and it dies right at 4,500mAH, that's about 1/4 of what is advertised. At the same time documentation states 66WH, that's closer (4.5 x 12 = 54) but still not there. Since people buy batteries for their power, this is clearly deceiving, be it ignorant or deliberate.
The good = through the discharge, the pack holds voltage very constant. Another good = the 12V low power outlet is limited to 2 amps. They say 3 amps, I measured 2. But it is a good thing, because the small 5.5mm power connector and its wiring could not handle that much current and something would toast. I also liked the digital charge display. It pretty much tracked my measurements, the problem is that it displays charge as a percentage of full charge, which is just a quarter of what's advertised. Since I got caught by the impressive 18,000 number and it betrayed that miserably, it is two stars from me.
I purchased this from Amazon back in January of this year. Luckily, I havent had to use it. I recently took it out of my car to ensure it was still charged and it was dead and just needed a recharge (or so I thought). When I turned it on it quickly indicated 94% then 80% then the display went off completely. I have tried charging it for the past two days and it won't respond at all. After reading all of the rave reviews, I was excited to find a well-priced portable battery but unfortunately my experience was not the same. Dont waste your money on this battery! Wish I could get my money back.