- Size (LWH): 4.96 inches, 2.52 inches, 0.39 inches
- Weight: 4 ounces
Anker Astro Slim2 4500mAh Ultra-Slim Portable Charger External Battery Power Bank for Samsung Galaxy S5, S4, S3, iPhone 6, 5S, 5C, 5, 4S, iPad Air, mini, Note 3, 4, HTC One, One 2 (M8), Motorola Droid, MOTO X, LG Optimus and most other USB-charged devices
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Top Customer Reviews
That being said my phone has an 1800mAh battery. Being that this battery is rated at 4500mAh, even after considering power lost to heat, and internal processes the bank has built in, it seemed reasonable for me to expect 2 charges. Sadly the Astro Slim2 delivered just a little over one.
Considering the quality, and thoughtful design, if you often find yourself out and about and away from a charger in your car or at home, this unit is still worth the money, and I'd still recommend it.
Anker responded to the negetive aspects of my review in a ridiculously fast manor, offering a replacement and seeming incredibly helpful, but I don't believe the item to be defective, still be of quite good quality, and am happy to have it. And now you can be sure the customer quality is impeccable. Again not a bad product if it's for you, but I can highly recommend Anker products in general, because they stand behind their products, and try to make sure their customers are happy.
Anker mailed me an unsolicited replacement just in case original unit was under-performing. After a few discharges I've come to the conclusion that the new unit is slightly outperforming the old. I am currently getting about one and one half charges, and suspect I may get a full two charges, if I were to completely shut my phone down during charging, but for what are probably fairly obvious reasons this isn't really practical. As stated earlier, the company has quality, affordable products with unbelievable customer service. If you're on the fence about purchasing a product the company offers, you should take their willingness to go above and beyond into consideration.
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It is beautifully designed, extremely thin, small and portable. It uses Grade A power cells which will provide years of recharging capability, up to 500 plus times. The battery pack has the power storage of 4500 mAh. It has a standard USB port and a built in Micro USB cable that can both output 5VDC at 1 AMP each, simultaneously. It can charge two devices at the same time. My testing reveals that this battery pack is powerful and effective with the capability of outputting 3700 mAh of its charging capacity which is 82.2 percent of its rated capacity which is an excellent result.
What I like is that the unit is priced well and it is so small and portable but can really carry a lot of power. It easily fits into your purse, briefcase or pocket. Since it is only 0.42 inches thick it can easily slip into a jacket pocket for easy access. You could recharge most smart phones from 2 to 3 times with this power cell. The battery pack is about the same size as an iPhone 4. It weighs in at 4 1/8 ounces and it has a matte finish that helps you to grip it and it does not show fingerprints. I have included a video of this review and I hope it is helpful to you.Read more ›
The Anker Slim2 is about the size of your typical new-gen cellphone; it is nearly identical in size and thickness to my Google LG Nexus 4. This means that it is just the perfect size to slip into the inside pocket of a suit or jean pocket. I can't mention how many times I've had to leave my other portable batteries behind because they were just too bulky or awkwardly shaped, rendering them completely useless when I needed them most. There's no need for a second thought with the Slim2; just slip it into a pocket and go. Forgot to bring a cable? No sweat; IT COMES WITH A BUILT-IN CABLE.
Did I mention that it comes with a built-in cable?!
Sorry for those in the proprietary cable camp (I'm looking at your, Apple), the built-in cable is Micro-USB only. Which means that, oh I don't know, it will work with JUST ABOUT ANY Android cellphone in the market. When not in use, the cable tucks neatly into the battery charging port. If your device doesn't have a Micro-USB charging port, Anker showed some love by including a USB output port as well so you can BYOC (Bring-Your-Own-Cable). Anker threw in a Mini-USB and a 30-pin iPhone adapter too, just for kicks. Furthermore, the Slim2 has a 4-LED display that tells you how much battery is left so you're never left wondering.
This all sounds amazing, so you might be wondering why the 4-star.Read more ›
Most Recent Customer Reviews
Very nice battery.
Size wise and easy to use
Highly recommended all Anker products
Loved it so much until it stopped working about 6 months in. Otherwise, it's totally worth the moneyPublished 6 months ago by Lexie
I kept this in my coat pockets all of the time. Due to traveling often this was a lifesaver. The only downside was losing it. I can't find it! Read morePublished 6 months ago by Brad K.
I got this December, 2014.
After using few times, I did not work...
I don't the warranty information.. Read more
Been using this for years, still holding up and if they still offer this when the one I have wears out I will buy another.Published 8 months ago by SnapDemon
It works amazing, however, the cable is too flimsy and prone to break.Published 8 months ago by Sergio Juarez Miramontes
Great battery pack. Unfortunately the built in micro-usb port is a little chunky and doesn't fit into my phone when it is in a case.Published 9 months ago by E. Cooper
It only lasted for 1 year and 8 months. Was good while it lasted.
Even though I did not register the product and it had a 18 month warranty, Anker was kind... Read more