EIUE External Battery,2 USB Outputs Portable Charger Power Bank with Type C Input,Aluminum Shell, Intelligent Charging Tech for iPhone, iPad and Android Devices

The Eui external battery has 4 bright LEDs indicating available power. While charging, a LED will flash and then remain lit (stop flashing) for every 25% of capacity charged until all 4 LEDs remain lit. While powering a device the LEDs are off but a quick push of the on/off button will illuminate the LEDs for 14 seconds to indicate remaining charge. Pressing the on/off for 2 seconds switches the Eui off, a quick push switches it back on.PRO: inexpensive for 10,000 mAh output LEDs are bright and widely spaced making them easy to see from a distance can be charged via USB-C input OR USB-micro input (a single cable with USB-micro and USB-A plugs included) ruggedly built appears to be high qualityCON: doesn’t have a digital numeric readout to indicate exact % of power remaining, just 4 LEDs (but costs less as a result) some minor grammar errors in manual but you can still figure out what is said the on/off button has to be pushed to illuminate the LEDs (but the LEDs are always lit when charging). I prefer the LEDs off when powering a device so not a ‘con’ for me doesn’t have a built-in a white LED flashlight like other battery packs (but costs less)CAUTION: When charging an external battery pack with a USB charger plugged into wall outlet be sure the charger’s output can supply the amount of current the battery pack's (or any device) input requires, which will be stated in amps (‘A’) on both the batt pack and charger. The Eui external battery, for example, lists input as DC 5V/2.6A; DO NOT use an Apple, Samsung, or any charger that lists output as DC 5V/1A as this rating will be significantly exceed by the Eui's 2.6-amp requirement, possibly resulting in damage to the charger or a fire. Many people who have had chargers failed blame the charger as faulty but were actually charging something that required more amps than the charger could supply. I use a dual-port charger by Anker (# A2023) that lists the output of each port as DC 5V/2.4A (4.8 amps total). Although the Eui external battery states the input requirement for charging is 2.6A (amps), the Anker’s stated output of 2.4A is probably enough amps since Anker and other high-quality chargers often produce slightly more amps than indicated to prevent their chargers from being returned under warranty as a result of being damaged by charging a device requiring more amps than the charger could provide (the Anker has a 2-year warranty). So Anker’s stated 2.4A max output per port is probably more like 2.6A-3A max output per port although i didn’t have the gear to confirm. And depending on how much the charger’s output is exceeded by the device’s requirement in amps (and the charger's build quality), damage to the charger could occur after a few minutes or after several hundred hours of use. Hard to say. Many chargers purported to be made by Apple and Samsung for sale at online auction sites are counterfeit and will produce LESS amps than stated making them especially hazardous (see Ken Shirriff’s excellent article, ‘A dozen USB chargers in the lab…’ at righto.com). Counterfeit and low-quality chargers can also affect the performance of touch screens. But I was able to electrically test the Eui’s input requirement in amps and it is actually 2.55A, not the listed 2.6A which means it will be a bit easier on the charger.

I'm using this unit with my Oculus Quest. I've got it mounted to the back head strap where it serves as both my battery extender and counter weight. I do agree with some of the other comments that it's fairly large and heavy, but that only makes it more suitable for what I'm using it for. If I have a complaint it's that it doesn't recharge very quickly itself, but that's a minor complaint. It more than doubles the battery life of my Quest, which is way longer than I'd ever use it at one sitting so I just throw it on the charger when I'm not using it, and my Quest always stays at 100%. Having both a USB C and a standard USB port for recharging is nice too, although I haven't yet figured out if it actually charges faster when you plug them both in. It's also true that it doesn't come with a charger, but you'd be hard pressed to find a household that doesn't have a dozen of those things lying around. Overall, for $10 you really can't go wrong with this.

I actually bought these because they were so inexpensive and I needed something to run my USB Air Pump for the fish tank. What surprised me was the quality and versatility of these little gems. They charge fast AND last a long time and are so slim they can fit unobtrusively just about anywhere. I use them in my purse for cell phone charging as well, and I highly recommend buying several just to have on hand or to give as a small but thoughtful gift.

The charger is a good looking unit, and works well. The problem is that without the A/C charging block, it makes it hard to charge the unit. You have to go out and purchase one doesn't make it cost effective.

I live in an older apartment which has limited outlets. I bought this fountain for my baby Archie, unfortunately where I needed to put it there were no plugs and didn’t want to string extension cords everywhere (I am queen of klutz) I bought this battery. I already had an older battery pack and wanted to be able to alternate, charge one while using the other. This battery ran circles around the older one. Fast charging time and long lasting. I will buy another one when the old one dies. Side note: I used this so much I wore out the micro port (charging cord came with it), it would take days to charge, ugh! I bought a type c cord, started using the other port and everything is awesome again! This battery is an A++++++++

Bought 1 of these because I like I liked their look specifically in black but wasn't planning to keep it for my for my own personal use since is not "Quick Charge 2.0 or 3.0" I have owned it for 2-3 months now and at times I misplace my main personal charger so I'll use this one as my backup portable charger. I really don't have anything bad to say about this portable charger except that is not QC enabled but they tell you that upfront, it has kept up with the power requirement needs of my Samsung Galaxy S9 even though is not QC enabled it changes my phone fast .and I'm sure it will keep up with the iPhone 11 too. I now own a couple of these in both colors, they feel great in your hand, in cold weather the metal get mighty cold, haven't had any issues with any of them. Except that they take a lil longer to recharge vs other similar chargers that I own but I don't mind as long as it gets the job done when I need it to. And it does everytime.

I like the thin and smaller size for this power packed unit. I have used it to charge my ASUS tablet, my phone and have it ready for a spare battery for my phone or sport cameras on longer bike rides.Having a choice of two outputs is nice as is the option of a two charging ports: USB C or USB mini. This way I can use my Phone USB C cord to recharge it or the USB mini I have for other devices.

The device did not charge my phone or anything that was plugged into it.