When I first received this, I loved the look of it and loved that it was matte which means that it is non slip which is great! But then I found that it is a fingerprint magnet which somewhat sucks but can be cleaned. First impression of the box, I noticed that on the back, that the cable was connected directly to an iPhone 5S and it says it is a battery pack for iPhones iPods etc, so I thought the cable that is included is a cable which is a lightning cable according to the image, but then I looked at it again and found out that the cable is hooked up to a uNu case which has microUSB. DECEPTIVE! I opened the item and found that the instructions were too basic, some things I wanted to know were not on there, like how to take the cable apart.

I then opened the battery and looked at it and BOY IS IT NICE! the look and design are BRILLIANT! the cable within the battery pack is genius! Only thing is that the cable is TOO SHORT! I will explain further. The battery pad not heavy and basically gives a good charge, at a medium rate, not fast not too slow, and it does not get too hot which charging or discharging which is good.

I will list the cons of this battery pack as it is good otherwise.

First of all, the power LED indication light is VERY confusing, in the manual it states there are several modes which light up different amount of lights to show how much battery is left, but this is not the case as for me, no matter what I see 3 lights on. Basically the illuminated ring which shows the battery percentage either doesn’t work in my particular device or I have no clue how to read it at all.

Secondly, if instead of coming with a microusb cable, it came with a lighting cable it would GREAT, as I am pretty sure the lightning cable would fit in the spot where the hole is currently right now.

The device is some what thick for the capacity. I have seen higher capacity batteries much thinner than this. I also had no clue of how to charge this as it didn’t tell me.

The cable is TOO short, it may be good for compact charging on the go, but it isn’t good for home use or using a wall charger with it.

Since this item didn’t come with a wall charger, I had to use my New Trent NT90C charger which I have also reviewed. The problem with the short cord is that it hangs on the wall outlet causing a hazard. It would be nice if they had made it so that the cord was a bit longer. I can imagine that instead of the two bumps for the cords being on the two sides, that there are bumps on all four sides which enables for a longer cord.

Finally, I was confused with the in and out on the bottom and all the unlabeled ports on the bottom.

In the end, this is over all a great design and idea. The only thing is that the cord is too short and the battery indicator is wonky. The reason why I would rate this a 3.5 stars is that it comes with a short microusb port, i mean if they could have made it come with a lightning connector option along with the microusb option it would be very good as some people have different devices. Otherwise if it had come with a lightning cable, I would have rated 4.5 stars, losing half a star because of the short cord, confusing indicator and being a bit too thick along with no specification of what charger to use. Point is MAKE A LIGHTNING CABLE!!!

Please note that I was provided a review unit by uNu and I was not required to write a positive review. All the contents stated above are my own opinion.

About Enerpak Flexi:
The uNu Flexi is convenient power at its finest. Built to be small enough to fit inside a pocket, purse, or backpack, the Flexi can follow you everywhere. Plus, the Flexi has a special flexible cable built into the design. Simply pull the cable out and begin to charge! When done, simply replace the cable back and the Flexi will return to its original form. Whether it’s a smart-phone, tablet, or most any other handheld device, the Flexi can help boost your battery life considerably. Meaning low-battery warnings are a thing of the past.

Popular Compatibility List:
Apple:iPhone 4S, 4, 3GS / iPod / iPad / iPhone 5 5S 5C, iPad mini, The retina iPad (iPad 4), iPad 5 (Apple Cable Required but not included)
HTC: One X, M7, m4 / EVO 4G / Inspire 4G
Samsung: Galaxy S4, Active, Mini / Galaxy S3. mini / Galaxy Note 2 , 3
Motorola:Moto X, Droid Razr, Bionic / Atrix 2 / Maxx
LG: Nexus 4, Optimus, G2
Nokia: Lumia 920 900/ N8 / N9
Others: Blackberry Phones / Sony Ericsson Xperia Z, Arc S / PSP / MP3 MP4/ GoPro
Google: Nexus 4 / Nexus 7 and 2nd Gen/ Nexus 10
Note: Flexi will not work with ASUS Tablets and some samsung tablets

Specs:
-Add 200-300% to smartphones, 100-200% to large screen phones, 30%~40% to tablets
-Input: 5V / 1A (max)
-Output: 5V/1A
-Size: 3 x 2.5 x 0.7 inch; Weight: 4 ounces
-Recharge time: 3-4hrs (AC charger not included)

Box Content:
-Enerpak Flexi Battery
-Built-in USB charging Cord
-1 Year Manufacturer Warranty

uNu Enerpak Flexi Portable USB Battery Pack with Integrated Charging Cable – Black / Black, Compatible with iPhone 5S, 5C, 5, 4S, 4, iPad 4, 3, 2, iPad Mini, iPods (Apple adapters not included), Samsung Galaxy S4, S3, S2, Note 3, Note 2, HTC One M7, M4; Google Glass, Nexus 10, Nexus 7, Nexus 4, LG Optimus G2, GoPro and More