The red clamp on the Smart Start Clamp was broken when I recieved the product. I tried gluing the clamp back together, but I don't know how long that will hold. The battery itself is fine so far, but I'm very disappointed in the quality of the camp.
EDIT: They quickly contacted me about my issue and offered to send a replacement cable for free, as well as a small reimbursement. I'm happy with how the situation was handled on their end. From the time of my purchase, I thoroughly tested the DBPOWER Jump Starter. I was wondering what the real capacity of the battery was in this device. I charged the DBPOWER power bank 5 times and each time I used it to charge my iPhone 6s and iPad Air 2. To measure the passing capacity of the battery, I used the PowerJive tester. I verified the validity of the measurements put out by the tester with the known capacity of the batteries in the iPhone (1715 mAh) and iPad (7340 mAh). The measurements obtained the following data: 1st time DBPOWER measured 6651 mAh 2nd .......................................... 6825 mAh 3rd ........................................... 6930 mAh 4th ........................................... 6458 mAh 5th ........................................... 6825 mAh The average battery capacity of the DBPOWER DJS10 was 6738 mAh, and not 12000mAh as the manufacturer says. This is 56.15% of the claimed capacity! As for the appearance of the DBPOWER Jump Starter and boxes used for transport and storage of the battery, I do not have any complaints! The materials used to make the DBPOWER starter and its boxes are of high quality and are pleasant to the touch. The battery and boxes were constructed neatly and look appealing! I also had a problem with a clamp to the positive terminal of the battery. It was already broken when I received it. I was offered a replacement clamp and a $10 refund to my account, so that was nice. I think the quality of the material from which the clamp is made is not very high. Perhaps this is a manufacturing defect. The actual design of the clip (minus the central axis) doesn't seem to be very strong. After 23 days, I got new battery clamps. Unfortunately I had some inconveniences this time as well! In the box were clamps and two separate halves of the protection unit of the red wire! I thought that it was broken for good, but it turned out they are easily snapped back together. I was able to quickly fix it, but the fact remains. I also tested the DBPOWER as a jump starter to start a car with a dead battery. In this test the DBPOWER device proved excellent! In total I started the car 25 times!!! The car being started had a 2 liter, 4 cylinder engine. The experiment was conducted over the course of six days. The DBPOWER jump starter stayed fully charged for two days. The first time I started the car was at a temperature of 32 * F (0 * C). Two days later I started the car 15 times in a row! I took a small pause (about 30 seconds) between starts. After these tests, the jump starter remained cold. The protective system for the wires was slightly warm. The DBPOWER device had about 70% of its charge left (3 LEDs lit). The next day I continued the experiment. I started the same car 5 more times in a row (with small breaks in between)! Two days later I started the car 4 more times! After all these grueling tests, the DBPOWER jump starter was at about 70% of the charge (3 LEDs lit). From the DBPOWER device I charged my phone twice more (not all the way). In total it took 2179 mAh. Once the device was fully charged, I used it to charge my phone and tablet. At full discharge the jump starter gave out 6649 mAh. To summarize, I can say that the real capacity of the battery in the DBPOWER jump starter did not exceed 6723 mAh (after 6 measurements) and certainly isn't 12,000 mAh! This is about 56% of the declared capacity! That's the battery capacity you should expect when it's used as a power bank. But as a jump starter, DBPOWER device is simply magnificent! I do not know how it will behave when trying to start more powerful engines, but I think it won't let you down.
PS: I also tested a jump starter from the company PILOT BULLY. After several attempts, I was able to start a car with an engine size of 2 liters and 4 cylinders only twice (and with a big break in between starts). Any other attempts resulted in the safety light coming on. This jump starter got quite hot.
I used to have a large jump starter with acid battery and it was great and lasted nearly a decade. When I upgraded I moved to lithium because it takes up less space. If space wasn't an issue in my vehicle I might not have switched because lithium batteries die in year or two, not a decade. This one is in a great case. I jumped my car after 6mo in trunk and when I turned it on there was still 89% charge and after the jump there was still 35% charge.
I just purchased my second set of 2 of these from Amazon. The first set, one was lost or stolen, the second it was requested that we leave with the car when we sold it. These 2 replace the previous ones. We had only a little trouble with the first ones (we haven't yet used these new ones) and that was in figuring out exactly how to use them (multiple buttons to press to activate the product when jumping a car). Aside from that, they've worked perfectly. I've used them to jump my car, my mom's car, and even a complete stranger's car when I saw he was having problems getting his started. It's fast and easy and gets you going quickly.
Update review as of3/2019. Received an email from DBPOWER regarding my past review. I can say the customer service is highly valued! I was dissatisfied with the first product I received back in June/2018. DBPOWER offered a refund or replacement, I took the replacement. These type's of compact vehicle jump starters are very nice and convenient to have. I received my replacement and thus far it appears to hold a better lasting charge from the first one. However I still have to check the charge every month to ensure i have enough charge. I live 3-1/2 hours away from a major city and I don't like to be so called 'stuck' without addition backup batter charger. Anything can happen and any given time. Even tho i carry cables to jump start doesn't mean anyone will pull over to assist so having this portable charger is highly important to me! It sounds minor to have to check the charge every month but with my previous charger I could 6-+ months with never having to check for the charger....guess i just got spoiled! So bottom line thus far... 4 stars, would have given 5 if the charger stayed charger longer then a month. The 2nd charger appears to be working ! Thank you DBPOWER for great customer service!
This is fantastic for those "just in case" moments that plague us at the most inconvenient times. I wish I'd had this the last time my battery was flat, it would have saved me an hour waiting for the AAA to arrive.
The benefit of this jump starter over a lot of others is that in addition to charging phones and tablets, it charges laptops. Instructions are clear and the handy LCD screen gives useful information as to the status of the jump starter. It also comes with a handy case to keep everything together in one spot.
The only improvement I would like to see is a micro USB charging input to take advantage of all the chargers and cables I have. Small niggle and there may be a good reason that they don't do it (such as to ensure the correct charging rate of the battery).
Overall, this will be a solid addition to my emergency kit.
When starting a review, Amazon ask you to rate the durability, battery life and versatility of the unit. I have to give it five stars for everything but battery life. And really, isn’t the battery what this thing is all about?
I have found that the shelf life of the battery is lacking. I charge it to 100% but after only a few weeks the charge is down to 50%. I thought this unit contained lithium ion batteries. If that’s the case, the charge should stay in the 90% range for months. I suspect there is some parasitic drain going on. Or, I might have a defective unit.
Otherwise this is a very nice device. There are lots of dongles to charge just about any device, the flashing and signal light functions work well. It seems well constructed. I was very hopeful that this would be the one to save my bacon if I ever need it. But sadly, I can’t be expected to recharge this thing every two weeks. It’s going back and I’ll try again.
I received a replacement unit and after a one week test, the replacement unit maintains 100% power while the original unit has decreased to 85%. It seems obvious that the original is defective in some way. Apparently there is some parasitic draw. The new unit is great.
It's a nice product that holds a charge for a very long time. My only complaint is what others had noted, in that it isn't totally automatic. In my case, any time I wanted it to jump start, I had to hit the button on the black plug that goes into the battery pack. That gives a temporary shot to the battery and enough to get it started. It's not a terrible inconvenience, but an inconvenience nonetheless.
If it were more automatic, it'd be 5 stars all the way
The battery in my plow truck was dead and we got dumped on with several inches of snow. Not wanting to drag out cords and the battery charger, I grabbed the DBPower out of the car trunk (outside temps single digits) and hooked it to the dead truck battery. It didn't do much at first so I fiddled with the cables and then hit the boost button since it's a 350 V8 engine and it hadn't seemed to have much impact the first try. Bam! Started up! I was VERY impressed.
I shut it off, and I knew to wait awhile before recharging, but I thought I'd see how much juice was left and it would not power up at all. I could not get the flashlight to work - nothing. I thought I just ruined it.
Well I took it in the house and went about my plowing operation, and in a couple hours I cam inside and plugged it in and the LED display showed 94% right away. I let it charge up and the light works etc, and it's held the charge at 100% for about 5 days in some below zero weather.
So I think I's fine, just strange that it wouldn't power up after jumping my truck when it appears that it had 94% charge remaining.
I sent an email to DBPower explaining this and asking if it was normal and they replied very quickly but didn't address the issue at all.
But aside from that I'm glad I have it, and am planning to get another one for my grand daughter to keep in her car.
Bought this unit because car trouble on a highway put family in peril. Was a recommendation by oldest son and am so glad we listened! For piece of mind, it's worth it's weight in gold! It holds its charge like no other energy bar and we've bought dozens of others smaller energy bricks for friends and family to use throughout the years. Charged it and it's been at 100% for weeks. Buy one for your loved one and show them how to use it with a vehicle. Learn it before you need to and this device may save your life one day.
It is packaged well, not a lot of waste. The grippy, rubberized surface of the charger is a welcome addition to avoid dropping the unit. I would also suggest someone review the owner's manual text again, because the wording is awkward in places, and false in others.
Page 3 At A Glance: 2. Labelled as Function Key. Text printed on charger says "Power".
Page 7 How to Use LED Flashlight. 1. Hold to turn on/off. Graphic is pointing to the on off switch.
Should read, Turn power on. Hold Function key to turn on/off flashlight.