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uNu Power DX PLUS External Protective Battery Case for iPhone 4S and 4 2400mAh - MFI Apple Certified (Matte Black/Sliver, Fits All Models iPhone 4S/4)

by UNU
745 customer reviews
| 7 answered questions

List Price: $79.99
Price: $19.99 & FREE Shipping on orders over $35. Details
You Save: $60.00 (75%)
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  • Highlighted by its lightweight, ultra slim design, the DX case measures an impressive thickness of just 17mm. Featuring the strengthened polycarbonate around the screen, the DX will provide the most comprehensive protection to your iPhone 4/4S.
  • Equipped with a 2400mAh battery cell the DX almost doubles the life of an iPhone 4/4s. The additional power yields six hours of talk-time, 35 hours of music playback, and a hefty 300 hours of standby time.
  • Awarded the prestigious Made for iPhone certification, the DX has gone through extensive testing and quality assurance to ensure reliability. In fact the DX has been proven to give quality power even after 500 full recharging cycles!
  • Made with state-of-the-art technology, the DX allows users to use any function button with case one, sync and charge with the case equipped, and visualize current battery levels (of the case) via the sky-blue 4-LED battery level indicator.
  • The DX case is backed by the 1 Year worry Free Warranty with Coverage on any factory defects. It also comes with free Gifts including: 1 x High Quality Screen protector, 1 x Micro Fiber Cleaning Clothe, 1 x USB charge & sync cable.
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Frequently Bought Together

  • uNu Power DX PLUS External Protective Battery Case for iPhone 4S and 4 2400mAh - MFI Apple Certified (Matte Black/Sliver, Fits All Models iPhone 4S/4)
  • +
  • iPhone 4 / 4S Anti-Glare, Anti-Scratch, Anti-Fingerprint - Matte Finishing Screen Protector
Total price: $20.99
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Special Offers and Product Promotions

Color: Black/Silver

Technical Details

Color: Black/Silver
  • Size (LWH): 5 inches, 2.48 inches, 0.71 inches
  • Weight: 2.56 ounces
  • Minimum Rated Talk Time: 10 hours
  • Minimum Rated Standby Time: 300 hours
  • Battery Type: Lithium Polymer
  See more technical details

Compare to Similar Items

This item: uNu Power DX PLUS External Protective Battery Case for iPhone 4S and 4 2400mAh - MFI Apple Certified (Matte Black/Sliver, Fits All Models iPhone 4S/4)
Customer Rating 4 out of 5 stars (745) 3 out of 5 stars (1638) 3 out of 5 stars (51) 3 out of 5 stars (180)
Price $19.99 $16.95 $17.22 $44.99
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Compatible Phone Models iphone 4;iphone 4s Apple iPhone 4 iphone 4;iphone 4s Apple iPhone 4
Color Black/Silver White Black black
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Product Description


Need even more battery power for your iPhone 4S & 4? The DX Plus has our largest battery which push the battery life of your iPhone to extreme! The DX Plus also provides a comfortable hand grip with the complete protection of screen, back and sides.

More than Doubles Battery Life
2400 mAh capacity, advanced battery technology delivers 40% more power than original DX case.

Standby/Charging Switch
Features a invisible toggle switch allows for standby and charging mode. Press and hold the silver button for 2 secs to toggle

Charge and Sync
Charge and sync your iPhone to iTunes through the case with using included MicroUSB cable.

Complete Protection
The DX plus provides a full body protection to your beloved iPhone. The included screen protector keep the retina screen from any scratches and dents.

Power Level Indicator
The integrated LED power indicator on the back shows exactly how much power left inside the case.

Acoustic Sound Enhancement
Front facing speaker cutouts redirect the music and voices from the bottom to the front.

Made for iPhone
All DX plus cases use Apple approved 30pin connector and have passed strict "OTA" lab test. Certified as "Made for iPhone" product.

What's in the Box
uNu DX Plus for iPhone 4/4S; Micro USB cable; Manual; Screen Protector

About uNu
uNu creates products to power and protect the technology that is essential to our lives. uNu products promote design simplicity while offering the marathon like power capacity and increased mobility for an enhanced user experience.

Product Details

Color: Black/Silver
  • Product Dimensions: 5 x 2.5 x 0.7 inches ; 2.6 ounces
  • Shipping Weight: 7.2 ounces (View shipping rates and policies)
  • ASIN: B0048IZL5E
  • Item model number: unu-dx-2400-sil/blk
  • Batteries Lithium Metal batteries required. (included)
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (745 customer reviews)
  • Amazon Best Sellers Rank: #5,517 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

157 of 161 people found the following review helpful By Turika on December 4, 2012
Color: White/Sliver Verified Purchase
Length: 4:53 Mins
I've had such positive experiences with the DX-1700 by uNu that when I saw the DX Plus I knew I had to get my hands on it and see for myself if the DX Plus is a worthy successor. Dissatisfied by the majority of existing reviews on the DX Plus, I decided to create something that would give the average consumer, like me, a glimpse of the product before committing to a purchase.

As a consultant, I run a hectic schedule that demands mobility and flexibility. Being on a conference call for an hour while driving or working at a client site can be taxing on my iPhone's battery, which initially led me to look for a viable solution to additional battery power. Enter the DX Plus.

The Good:
1. Competitively priced with a great balance of quality and reliability.
2. The DX Plus echoes the aesthetics of the iPhone's design, especially the glossy white and silver trim. And speaking of design, the battery case feels like a cohesive unit. No clumsy wires or additional cables to carry around.
3. It works, and then some. I can go an entire day without plugging in my phone to a wall charger, and that includes web surfing, sending/reading emails, and running various apps.

The Bad:
1. The DX Plus will add some considerable bulk to your slim iPhone.
2. The DX Plus adds extra weight.

At 2,400mah, the DX Plus was aimed at a specific target market - power users. That's 10 hours of extra talk time! I've checked the power capacities of other brands and the DX Plus has more juice than most. Indeed, this thing will make your iPhone feel like a mini-tank, but in my humble opinion that's a small tradeoff for the convenience and peace of mind in knowing that you won't be stuck without power when you need it most.
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18 of 18 people found the following review helpful By S. Ababio on November 6, 2014
Color: Black/Silver
Currently own both battery cases. I bought the uNu because it has more battery capacity than the Mophie. Price wise the uNu has the advantage. The uNu also has a better micro usb connector, the Mophie micro usb connector can break in some cases but most of the time the usb cable for the Mophie tend to fall out a lot, you will need a micro usb cable with a long nose so it stays in place.

In terms of charging the iphone when running out of juice, I like the Mophie simple switch, you do not turn on the switch it does not charge the phone. With uNu as soon as you slide in the phone it start to charge it, you will have to manually turn off the automatic charging by pushing and holding the switch for like 5 sec. I do not like that, for example if your phone is fully charge who wants it to be charge when you slide it into the case.

Another thing is the build quality. I have to give this to the Mophie, its solidly built. I have had the Mophie longer than the uNu. Unfortunately the uNu has failed to protect my phone. The problem is the top cover, its very flimsy. Drop your phone once and it will crack, have a 2 year old play with it and they can break the top cover. It does not also sit well and can slide off easily. Because of the weak top cover my iphone has a crack on the lower screen. This happened when I attempted to pull it out of my pocket, the top case slid off and the phone fell.

This is the one issue I hate about the uNu. I have dropped my phone in a Mophie case several times from ear level with no single damage to my phone. If only they will improve the top cover this will be a great battery case.

So now its up to you to make the choice. They both are not perfect.
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44 of 54 people found the following review helpful By William D. Charschan on July 20, 2012
Color: Black/Silver
What can I say, I had such a low bar for this type of product. The reviews on the older model were good and the newest one for the 4s seemed like a good bet. Even with the wifi on all day, my phone still reads 100 % battery.

I am coming off an otterbox case that did not wear as well as i would have liked and figured the enhanced battery would be a blessing.

The good -
1. Good materials, seems solidly made and it just works (which is why I generally like apple products). The kit also comes with a cable to plug it in. This is not an apple cable btw but a different type of connector. Since the phone can now sync via wifi, this is not a biggie. It comes with a screen wipe which worked well.

2. The phone slips in easily and the case clips together just as easily. This makes it easy to take it out if we need to later on for whatever reason.

3. Case has nice clean look to it. While I have not dropped the phone yet to see how effective it is, it looks like it would protect the phone.

The we can do better department - The screen cover is a piece of plastic with two stickers on it. When I attempted to remove them to put it on the cover to protect the glass, the glue smudged on the surface of it making it relatively useless. I am using the phone now without the protector. There has got to be a better way of doing this guys.
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8 of 9 people found the following review helpful By Anthony Graziano on April 17, 2013
Color: Black
I ordered 2 of these for my wife and myself. They both worked well initially but both have failed rather quickly. My wife's failed within 3 months and mine lasted about 6 months. The plugin fails internally and then it won't charge. Another significant design flaw is that the top piece, the cap on top of the phone, slips off constantly and both have broken rather easily. Very flimsy design and materials.
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