Frequently Bought Together
What Other Items Do Customers Buy After Viewing This Item?
Technical Details
- 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)
Product Details
Would you like to give feedback on images?
|
Product Description
UNU External Battery Case for iPhone 4/4S Matte Black - UNU DX-1700B.
Customer Reviews
Most Helpful Customer Reviews
32 of 34 people found the following review helpful
Amazon Verified Purchase
If you're on the fence about this case... just buy it. I had the mophie and the mili battery case for the Iphone 4... but they both sucked compared to this case. This case wont scratch like those others due to the soft touch of the case. It lasts longer and is soooo much cheaper. It will recharge your iphone 4 about 75% of the way back. I know it says 1700mAh but the mili and mophie are like 1500mAh and will only give you about 40-60% recharger... so this case is defiantly better in terms of power. The feel is great! The only problem and it's not really a problem is the case is not really really snug... I mean you can't tell if you look at it and it doesnt slide around in the case but you could defiantly have a protective film on the iphone and still get it in the case.... I HAVE HAD NO PROBLEMS WHAT SO EVER! I would buy it again 10x over.
26 of 27 people found the following review helpful
Amazon Verified Purchase
|
Length:
7:08
Mins
My review for the uNu DX-1700 battery case. For the video-impaired, it is an excellent product and I really enjoy having it! In this video I go through how it works and my experience with it so far. I hope you enjoy it!
26 of 29 people found the following review helpful
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. :)
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. :)
Most Recent Customer Reviews
Great!!!
I use my iPhone a lot, and before I got this case, the battery would die every day before I got a chance to charge it at night. Read more
Published 3 days ago by Tanner
Did not last, cannot contact manufacturer
I used this for 4 months and then it quit. I tried to contact the manufacturer on their website but my message was not accepted. I am now looking for a better quality product.
Published 16 days ago by MC
For one week, it worked great.
This charger had a lot going for it. Decent size, didn't make the iPhone4 too heavy. (It does add some weight, so be prepared). I loved it for about 5 days. Read more
Published 16 days ago by J. M. Kopecky
Decent for the price
The case itself is easy to look at, and easy to use. the only problem i had with it, is that the small clips broke as soon as i tried to put it on my phone.
Published 25 days ago by ihorsey
Nice product with some acceptable CONS
Nice product with some acceptable CONS
I got this case for my iphone 4s for a while. In the past several months it worked well and protected my phone several times when it... Read more
I got this case for my iphone 4s for a while. In the past several months it worked well and protected my phone several times when it... Read more
Published 28 days ago by YunLi
Excellent battery case
The rubbery case provides excellent protection to the iPhone. The battery case is so much more convienient that an external battery. I would refer this to anyone. Read more
Published 29 days ago by Coachter
Great buy. A must have for any iPhone user.
I bought this case a little over a month ago. It truly has been the best purchase for my iPhone. I receive a large amount of phone calls, texts, and email throughout the day. Read more
Published 1 month ago by Bucs
Excelent
Discret, practice, resistant. When Iphone is 3% of battery the case charge it until 85%. that is very good. I recomended it.
Published 1 month ago by Carlos A Carvajal
I phone travel case
Product works great. Gives an additional
+ 3/4 battery life
Negative is it makes the phone heavier
I keep it in my briefcase. Read more
+ 3/4 battery life
Negative is it makes the phone heavier
I keep it in my briefcase. Read more
Published 1 month ago by Skyxxx
This case is definitely worth it
This case won't let you down, It looks good and it keeps my phone up and running the whole day!!!. It's the best iPhone accessory I've bought up to date.
Published 1 month ago by Jorge L. Lopez
Related Items
- Most Popular
- Cases & Covers
- Screen Protectors
- Chargers
Tags Customers Associate with This Product(What's this?)Click on a tag to find related items, discussions, and people.
|
Customer Discussions
|
This product's forum
Search Customer Discussions
|
![[Start the discussion]](http://g-ecx.images-amazon.com/images/G/01/x-locale/communities/discussion_boards/start-new-discussion-sec._V192250339_.gif){kind=small}
Listmania!
So You'd Like to...
Look for Similar Items by Category
|
