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Anker® Astro E4 13000mAh Dual USB Portable Charger Backup External Battery Power Bank for iPad Air, mini, iPhone 5S, 5C, 5, 4S, Galaxy S5, S4, S3, Note 3, Nexus 4, 5, 7, 10, HTC One, One 2 (M8), Droid DNA, Motorola Droid, MOTO X, LG Optimus, most other smartphones and tablets (Apple adapters 30 pin and lightning, not included) - Black

by Anker
| 137 answered questions

Price: $79.99
Sale: $43.99 & FREE Shipping. Details
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Black
  • Huge capacity (13000mAh) charges the iPhone almost 6 times, large-capacity phones like the Galaxy S4 more than 3 times or about an 80% charge to an iPad 3 / 4.
  • Super-fast charge output (5V / 3A total) through dual USB ports (5V / 2A and 5V / 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.
  • Smooth, ivory/ebony varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.
  • Premium lithium-ion battery ensures quality, supplying 500+ recharge cycles over a lifetime. Use a 1.5A adapter (not included) with the included USB cable for fastest charging (6.5 hours).
  • Package contents: Anker® Astro E4 External Battery, Micro USB cable, travel pouch, instruction manual.
1 used from $38.99

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Color: Black

Frequently Bought Together

Anker® Astro E4 13000mAh Dual USB Portable Charger Backup External Battery Power Bank for iPad Air, mini, iPhone 5S, 5C, 5, 4S, Galaxy S5, S4, S3, Note 3, Nexus 4, 5, 7, 10, HTC One, One 2 (M8), Droid DNA, Motorola Droid, MOTO X, LG Optimus, most other smartphones and tablets (Apple adapters 30 pin and lightning, not included) - Black + Pwr+ 5V 2A Rapid Charger AC Adapter for Anker Astro, E3, E4, E5, Mini, Slim2, Slim3, Astro2, 2nd Generation Astro 3, SlimTalk / New Trent iTorch IMP52D, CarbonPak, Easypak, iMirror, PowerPak+ / Limeade Blast L130X L180X L50X2L L50X2M / Jackery Bar, Giant, Mini / EasyAcc / PowerGen Mobile / PowerBot External Battery Pack Portable Universal USB Power Bank Backup
Price for both: $55.99

Buy the selected items together


Technical Details

Color: Black
  • Huge capacity (13000mAh) charges the iPhone almost 6 times, large-capacity phones like the Galaxy S4 more than 3 times or about an 80% charge to an iPad 3 / 4.
  • Super-fast charge output (5V / 3A total) through dual USB ports (5V / 2A and 5V / 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.
  • Smooth, ivory/ebony varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.
  • Premium lithium-ion battery ensures quality, supplying 500+ recharge cycles over a lifetime. Use a 1.5A adapter (not included) with the included USB cable for fastest charging (6.5 hours).
  • Package contents: Anker® Astro E4 External Battery, Micro USB cable, travel pouch, instruction manual.

Product Details

Color: Black
  • Product Dimensions: 5 x 3 x 0.9 inches ; 10.9 ounces
  • Shipping Weight: 14.9 ounces (View shipping rates and policies)
  • ASIN: B00BQ5KHJW
  • Item model number: AK-79AN13K-BA
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (1,123 customer reviews)
  • Amazon Best Sellers Rank: #1,246 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
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Product Description

Color: Black

With such massive capacity, in such a compact package, the Anker® Astro E4 is perfect for flights, road trips, or just any time you're away from an outlet.

Enough power to go around.
Marooned? In transit? Forget your OEM adapter? With the Anker® Astro E4, prolong your battery life multiple times, wherever you are. Holding enough power to charge a smartphone 3-6 times (depending on your phone's battery size), keep your gadgets going for days and still have juice left to share.

Strong but never slow.
In addition to capacity, the Anker® Astro E4 sports two concurrent, high-speed ports. So whether you're charging an Apple or Android device, you'll get the most out of your technology. We've also included connective adapters to ensure compatibility with most devices.

Designed around the details.
Just because the E4 packs a punch, doesn't mean it can't look nice. We went with a smooth, ebony finish to keep you traveling in style. Simple, unobtrusive features, such as one-touch status LEDs and a built-in flashlight, give you everything you need out of a battery without sacrificing aesthetics.

For optimal use.
• For simultaneous, max-speed charging of your Astro and other devices, check out Anker's new 25W 5-port wall charger or dual-port 24W car charger.
• Compatible with all Apple and Android smartphones, tablets and other 5V input USB-charged devices. The iPod nano, the Samsung Tab2, Asus tablets (not include the Nexus 7), the LG G2 and some GPS and Bluetooth devices are not supported.
• To ensure complete safety and best performance, we strongly recommend using your device's original cable, a third-party certified cable (such as MFI) or our included cable.

Customer Questions & Answers

Customer Reviews

It charges it quickly, more than once (I've recharged my phone 5 times).
Zorba Paster
I now can use my 'phone all day without worrying when the battery is going to give up the ghost and where the nearest outlet is going to appear.
Bethann Smith
Although it is a little on the large size, it still fits in a pants pocket.
NATHANIEL B LOCKLIN

Most Helpful Customer Reviews

173 of 188 people found the following review helpful By Daniel Doron on May 24, 2013
Color Name: Black
Length: 5:26 Mins
Like a wall outlet, anywhere... even while mobile

I go over different aspects in my 5-minute video review, so please check that out for more info.

Frankly, I wouldn't have thought to buy this for myself. I would have thought, "I can manage... I HAVE managed without this portable power plant of a battery so far..."
And I have, for years, managed.
But I received the E4 as a review unit (see disclosure below), and just threw it in my bag with my things when I went out.
And once you realize you've got such in incredible reservoir of power everywhere with you, well, let's just say your daily behavior that was previously subconscious to you... changes.

First of all, for packing as much power as it does, Anker pulled it off in the sleekest possible package in my opinion. Sporting a glossy black finish with a silver matte band, it feels in the hand like two black iPhone 3GSís facing each other; only a touch heavier, taller, and wider. Just the same, it feels as solidly build and sturdy as youíd hope for in this E4. Nothing feels flimsy or neglected in itís build quality or design.

If you regularly find yourself wanting to charge your devices, or feel you're making too many compromises for the sake of battery life (airplane mode, lowering the brightness, etc.), get yourself an external battery. Throw it in your bag, and forget about finding outlets in public spaces anymore.

Even if that doesn't happen for you often, it's perfect to take along on trips (use it for rechargeable camera batteries!), to the airport... you get the idea.

I think what surprised me the most was that I was finding it useful where I never would have guessed, because it never would have dawned on me.
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113 of 128 people found the following review helpful By Joseph Siu on May 9, 2013
Color Name: Black
Since Anker gave me this product in exchange for my honest feedback and review, I decided to take the Astro E4 power bank through its paces to see how it performs. I was quite pleased with the results; this is one solid external battery. Details below.

The battery came in a nice-looking box along with a carrying pouch and an interchangeable-head USB cable; the cable came with three adapter heads: Micro-USB, Mini-USB, and iPhone/iPad (30-pin). The power bank itself has a smooth, black plastic shells and is quite elegant-looking with its chrome button and silver-colored frame. The unit has 4 bright, blue LED lights that reveals roughly how much battery life is left. The Astro E4 is somewhat heavy, but it is expect of a power bank of this large a capacity; the best way I could describe it is probably holding 2-3 rolls of quarters in your hand (not bad, right?). Due to its size and weight, this external battery is a perfect companion for your day-pack (messenger bag, backpack, purse, etc.)

In terms of real-life performance, I ran tests using an iPad 2 and a Google LG Nexus 4, on multiple charge cycles. After charging the power bank to its fullest, I was able to get around 9200 mAh out of the the unit, which is around 71% of the stated capacity. Almost all external batteries perform below stated capacity, and some by a lot, so getting this amount of juice out of the Astro E4 is pretty decent. It is important to note that the charging devices were left on and drawing power for Wifi and cell signal; the actual capacity is probably even higher.
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94 of 107 people found the following review helpful By Robert D. Banks on July 7, 2013
Color Name: Black Verified Purchase
Charger will not charge. Charger just stopped functioning after 3weeks. Very disappointed in the lack of dependability and quality. Cost of return to high for value of charger.

I am compelled to amend my above review of this product based on very recent experience. I am motivated to so after a very pleasant and productive response from customer service of the Anker Company. Obviously they actually read my product review and reached out to me in a very timely manner. They listened to me and made arrangements to send me another charger immediately while apologizing for my inconvenience. I am more than willing to try this product again based on the company's confidence and support of their product.
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17 of 19 people found the following review helpful By Steven Steele on June 22, 2013
Color Name: Black Verified Purchase
So far it works as described. Easy to charge and has all the adapters to charge my toys. The one really bad flaw is an on/off button that is raised above the case. This means it tends to get turned on accidentally in a briefcase or suitcase. Anyone that travels frequently knows that on/off switches need to be sunken in the case or protected by a raised bevel.

UPDATE --->> I had to come back and give this device a fifth star, as much for the Customer Service as anything else. I have used it several times and it works great. In addition to that, the manufacturer has emailed me and Customer Service called me last night and offered to exchange this for the Anker 14400 which apparently has a more flush button. I declined because I really like the way this one charges but I was very impressed. They really seemed like they were not going to rest until I was completely satisfied. 5 stars for attitude!
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