uNu Power DX External Protective Battery Case for iPhone 4S & 4 (Matte Black, Fit All Models iPhone 4 & 4S)

by UNU

• 1 Year Worry Free Warranty with Coverage on Both Way Shipping & Replacement Cost
• The case offers Full body protection. The black matte anti-slippery finish will also offer a great feel while being held in hand.
• 4-LED Skyblue Remaining battery indicator.Invisible Switch Control design (Hold the Indicator button for 2 seconds to connect/disconnect your case with iphone)
• Built-in 1700mAh High volume battery. Smart circuit design, fully support charging and syncing the iPhone via included microUSB cord.
• Bonus Gifts: 1 x High Quality Screen protector. 1 x USB charge & sync cable.

Product Details

• Product Dimensions: 0.7 x 2.4 x 4.7 inches ; 4 ounces
• Shipping Weight: 4 ounces (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B00409E4JK
• Item model number: DX-04-1700B
• Average Customer Review: 3.9 out of 5 stars  See all reviews (484 customer reviews)
• Amazon Best Sellers Rank: #573 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • #30 in Electronics > Accessories & Supplies > Cell Phone Accessories > Batteries
• Date first available at Amazon.com: August 21, 2010

Product Description

Color: Black

Features Highlightsbr> - Apple Certified 30-Pin Connector
- Built-in Battery + Protective Case + Signal Problem Fix
- Fully Support Charge and Sync with Case On
- Smart Switch, Gain more control over charging to enhance Safety
- Accurate LED power indicator, flashing when battery runs low
- Perfectly design, offer a full protection only for iPhone 4
- Battery Capacity: 1700mAh
- Standby Time: > 210 Hours
- Call Time: > 5 Hours (3G) / 10 Hours (2G)
- Browsing Time: > 5 Hours (3G) / 7 Hours (WiFi)
- Music Time: > 28 Hours
- Video Time: > 7 Hours

Specificationsbr> Material Lithium Polymer
Capacity 1700mAh
Dimension 120x62x17 (mm)
Charging Time 3-4 hours
Life Cycles 500 Cycles


Item Contentbr> 1 x Micro USB charging Cord
1 x Elegant uNu retail package
1 x Micro Fiber screen cleaning cloth
1 x Matte Black battery case for iPhone 4/4S
1 x Transparent Screen protector for iPhone 4

Be sure to check all above content and make sure you are getting an authentic UNU PowerDX case.

counterfeit will severely damage your iPhone and void your iPhone's warranty

Most Helpful Customer Reviews

307 of 316 people found the following review helpful

5.0 out of 5 stars The Unu DX-1700 is a MUST for professionals on the go! December 4, 2011

By Turika

Color Name:white|Amazon Verified Purchase

Length: 7:14 Mins

I don't normally write too many reviews but I had to write something about the Unu DX-1700. I've spent a great deal of time doing cross comparisons of different battery cases on the market before I settled on the Unu. There is relatively very little information on the web about the unit so I figured I'd help out buyers like me who like to research the item before they commit to buying. So here goes:

The Good:
1. The Unu is attractively priced. Many other battery cases range anywhere from $60 - $80 which is way out of my price range for this type of product.
2. The Unu looks good. I've got a white iPhone 4 (Verizon) and a majority of the battery cases out there are black. Also, the Unu has a nice, glossy finish which compliments the iPhone.
3. It works. I can go an entire day (13 hours) without recharging my phone, and that includes web surfing, sending/reading emails, and of course playing games.

The Bad:
1. The Unu does add some considerable bulk to your slim iPhone. Both in thickness and in height.
2. The Unu adds extra weight (mainly from the battery) so throwing it in your pockets may be uncomfortable.

Bottomline:
It's a quality battery case that works well, compatible and reliable, and is relatively inexpensive. There are negatives, but they're all superficial. If you're a person who is always on the go and you don't always have time to charge your phone then this case is for you. I've had my Unu for nearly 4 months, and it has saved me on many occasions, particularly last week when heavy winds knocked down all the electrical lines and our neighborhood had no electricity for 3 days. Outstanding product - gets 8 out of 10 stars from me.

51 of 52 people found the following review helpful

5.0 out of 5 stars Impressive! March 28, 2011

By sip31

Color Name:white|Amazon Verified Purchase

I was hesitant to try this knockoff batt case... but trusted the other review on here. It is very sturdily built and provides lots of boost. I love the sync passthrough that is only available on the cases that cost double and not on other alternatives. The only two drawbacks I've found are the added weight/bulk (duh.. to be expected) and you cannot use the camera with flash at night inside this case. It reflects off the white and blurs out the picture. Really not a deal breaker for me.

I cannot suggest this case enough as an alternative to the higher priced cases. Love it for the weekends when I am not around power all the time. This case holds my VZW iPhone 4 at 100% for at least 24 hours with heavy usage... plus then I have a full iPhone batt after that!

9/10 :)

106 of 114 people found the following review helpful

5.0 out of 5 stars Cost Effective Alternative July 30, 2011

By Patric Michael

Color Name:Black|Amazon Verified Purchase

I was delighted to discover these little gems were still offered by Amazon, and at a slightly reduced price from the first one I purchased a year ago.

Back then, when the iPhone 4 was first released, there weren't many "power case" options available. I found this one, freshly listed by an unknown-to-me seemingly Chinese company and I hesitated. Long enough for someone else to leave a review. (Thanks Crispin38!) After all, I frequently haunt the "wholesale direct" websites and the quality often leaves much to be desired.

When that first review arrived and it was positive, that was good enough for me to take a chance and keep my fingers crossed, and am I ever glad I did.

Mechanically, the case fits rock solid. No gaps or sloppy contact points along the seams, and the snap-together closure seats firmly into place. The end result is a trim, slightly thicker than before phone which fits confidently in my grip, with no slippery or "too thin" sensation. Turned to landscape mode for two-thumbs typing, the size is just right for my large hands to reach any key present.

Electronically, the case delivers pretty much as promised, so long as you explicitly follow the manufacturer's admittedly sparse instructions. Unu presents this case as a "recharger," rather than an ongoing power supply, meaning that they recommend turning the device on only after the phones internal battery is depleted. Used in that fashion, the case consistently recharges the phone battery from 20% to 100% every time, though the "power low" warning light starts flashing at around 85% or so.

However, it occurred to me to go against the manufacturer's recommendations and use the case as an alternative power source, thereby saving the iPhone's internal battery from the inevitable charge cycle failure. After all, $50.00 is a lot less expensive than what Apple charges to replace a failed phone battery. :)

Thus, I charge the case up each night and it lasts through most of the next day, powering the phone though an "average" day of voice calls, network and cellular surfing, playing music, any number of apps being run, and perhaps a few YouTube videos. By the end of the day, the low power warning is either blinking or given up altogether, but by then I am home and the phone is more or less docked or corded for the night. Remember that this kind of usage is *opposite* the manufacturer's suggested application and your mileage may vary, not to mention probably being contrary to it's warranty. For me, I have no problem with that because a year after having purchased the iPhone 4, it's internal battery is still capable of delivering a charge time comparable to when it was brand new.

As specified, syncing and simultaneous charging work without incident or effort, and I've never had an occasion where an OS upgrade failed simply because I synced through the case, unlike the failures I am sure to get using certain third party cables.

As a bonus, and an additional reason I am so glad to see them still available is the flat top, bottom, and sides of the case's styling. This allows me to use the phone with any of the clinometer or "carpenter's level" type apps and never have to take the phone from its protective case. In fact, the "softened square" style of the case, and its ability to charge the phone when connected to a portable power source (the i.Sound Portable Power Max with 16,000 mAh for iPod, iPad, iPad2, iPhone, Droid, and Blackberry in this case) allowed me to build the old case directly into a self-powered video tripod system which allows me to literally shoot all day long without interruption.

If you're on the fence about this baby, because of the poorer reviews or just because you've never heard of Unu, jump down, read the instructions, and grab it anyway. There really IS an on/off switch and it works flawlessly. Plus, if you happen to be unlucky enough to get the inevitable "lemon" inherent with any mass produced appliance, Amazon's refund/exchange policy works, and this jewel is worth the extra effort to exchange it and get a good one. :)