This review is for the SHARKK® 10000mAh Dual Port Power Bank. I was sent a 10000mAh Power Bank by mistake, but the only difference in the 10000mAh and the 15000mAh is the power rating. All other aspects of the two are identical.
Upon opening the box, the first thing that I noticed about this power bank compared to others that I own is the build. This one is rock solid; there are no seams, clips, or screws. It is a textured outer shell that has been sealed with a hard plastic potting material. From what I can tell also, all of the electronics on the inside are encased in potting material, so there is nothing that can move around and vibrate loose if you accidentally drop it on the floor. The textured outer shell is a nice change also, as all of the other battery packs that I have are all smooth. This one has a gritty feel to it almost like a fine sand paper. The texture fits the name, I am not sure if their intention or not, but if you have ever slid your hand across a sharks skin from tail to head it will feel pretty similar. The shell is a light grey and the plastic material on the sides is orange. There are 2 USB A ports, 1A and 2.1A, for charging your devices, a USB Micro port for charging the power bank, and a Button for turning it on and checking the power level. Holding the button down for a couple of seconds will turn on up to 4 LEDs on the top telling you how much charge is left in the bank. Each light is roughly a 25% increment, down until there is only 1 light flashing meaning that there is less than 5% left, and it is time to recharge.
As for the functionality, it has performed very well in my opinion. I have a Nokia Lumia 920 that I will plug into charge when it gets down to around 20% or so, and I am able to charge it back up to 100% in about 1.5 hours. It can do this just about 5 times without needing to be charged back up. I say just about because the fifth time it only charged my phone up to 80%, but my wife had also used it a time or two to charge her phone up a little ways so that is more than likely why. One of the best features that I found this one has is that it will automatically shutoff when you phone reaches 100%, preventing the phone from leaching off of it after it's charged. To start the charge, just hold the button on the side down until the power level indicator lights come on, and set it down. When your phone is done charging, the lights will go off. With it being 5.4” x 3.0” and ¾ of an inch thick, it isn't much bigger than most cell phones, so it slides easily into a pocket, or purse without taking up too much space. Depending on your preferences though, it can be considered a little heavy for carrying around everyday in your pocket, but this is about standard when it comes to power banks of this capacity. But for me the piece of mind in knowing that I will have enough juice to last me through out the day, when traveling in through the airport or doing work out in the field with no power is greater than the cost of the extra weight.
Overall, this is a wonderful power bank, especially for the price when you compare it to some of the other brands out there. I have purchased a few other Sharkk products and have never had any issues, and when I have any questions a quick email to their customer support and they are quick to respond back and get me an answer.
I was provided this product by Sharkk for free in exchange for a honest and unbiased review.