
Overall this is a great little charger. My favorite feature would definitely have to be the DC plug since my car only has 1, and I don't have to buy another splitter to power other devices.
For powering a laptop, the AC plug works great.
The main reason I bought it was to power a HP Touchpad, which apparently the 2.1amp USB plug still has trouble doing.
The only other complaint I would have about it is that the fan makes a quiet ticking noise. It's just loud enough to hear; if it were more like a fan noise I wouldn't have an issue with it.

I initially was looking for an inverter with an extra 12V power outlet because I have a Soundfly Car FM Transmitter for SD card/USB/MP3 in my older car (which lacks an Aux input on the stereo), and the Soundfly occupies the 12V outlet all the time. Finding such an inverter which ALSO has a USB power port, and a 2.1A high-powered one at that, was a huge bonus. And the cup-holder form factor is very convenient. This product is brilliant; absolutely, totally perfect, or it WOULD be... And that brings us to some of the minor drawbacks.
For one thing, there is no On/Off switch on the inverter. My car never turns off its 12V socket, key in the ignition or no key. The Duracell inverter theoretically will disengage if the car battery gets low, but I'd rather not find out. That means remembering to unplug the thing every time so as not to leave the inverter circuits constantly live on the battery, which greatly lessens its convenience.
For another thing, the USB port is supposed to be a high-current 2.1A variety. However, my iPad2 doesn't seem to charge at full speed on it. The iPad SAYS it's charging, and the charge percentage doesn't go down, but then, it doesn't really go up, either.
Another minor complaint, the inverter fan generates a faint ticking buzz. It's enough to be irritating if you're sitting in the parking lot listening to something quiet, but luckily, once you're underway, the fan is easily masked by engine and road noise. I rarely notice it, and honestly, the Duracell is much quieter than the last inverter I owned.
(Also, there is only one of each kind of port. One 12V, one AC, one USB. For me this is perfect, but if you need, say, multiple USB charge ports, you might need to go a different way.)
I have addressed these concerns by: Ignoring the fan noise. Using my iPad on the USB port, and not worrying about whether it's charging at full speed or not. (If my iPad is REALLY low and I need it to definitely charge FAST, I can always plug its own little white charger into the AC outlet on the inverter. Shouldn't have to do that, but it works.) And finally, I installed a heavy duty lamp cord switch on the inverter's 12V power feed wire, so I can leave the unit plugged in in my car but turn it on and off. Thus voiding the product warranty, but for me, the increase in usefulness was worth it.
Overall, this is a highly useful gadget, I use it every day and am glad it's there every day.
Buy Duracell DRINVC130 130W Power Inverter with 2.1 Amp USB Port Now
This is a great little inverter for the money. It doesn't get 5 stars because of one very big problem--if you leave it plugged in, it will run your battery down if your vehicle continues to send power to the cigarette lighter even when the key is turned off. Luckily for me, this happened to me in a nice, heated garage, and I had another vehicle with jumper cables handy. Since then, I have been very careful about unplugging it every time I get out of the car. The cupholder shape fits perfectly into my car's cupholder. I love the fact that it has 3 outlets--(1) 12v outlet, (1) 120v outlet, and (1) usb charger port. I can charge my phone, listen to my mp3 player (powered by 12v), and run my GPS off the wall charger all at the same time. When I was researching to buy this unit, I spent a lot of time looking for one similar to this. There are cheaper and less expensive units out there. Very few had the size, power, and function of this unit. It's been great so far. It's never overheated (yet), and it is so quiet, I can't even hear it running, even with the car turned off. When I bought this, it was about $40.
Read Best Reviews of Duracell DRINVC130 130W Power Inverter with 2.1 Amp USB Port Here
Used this for 5 weeks to power my laptop at work a total of maybe 215 hrs before it just died.
Want Duracell DRINVC130 130W Power Inverter with 2.1 Amp USB Port Discount?
It does pop out sort of easily of some types of cup holders, but for the most part we have been very happy with it and it has been very useful.
Save 36% Off