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Anker Astro E4 Classic 13000mAh Portable Charger (2nd Generation High-Capacity External Battery Power Bank) with High-Quality LG Battery Cells

by Anker
4.6 out of 5 stars 6,476 customer reviews
| 583 answered questions

Price: $89.99
With Deal: $22.99 & FREE Shipping on orders over $35. Details
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  • The Anker Advantage: Join the 10 million+ powered by our leading technology.
  • Exclusive PowerIQ Technology: Detects your device to deliver its fastest possible charge speed up to 3 amps.
  • Huge Capacity: Charges the iPhone 6 five times, the iPhone 6 Plus or Galaxy S5 over three times or the iPad Air once. Safely recharges with a 2 amp or higher output charger (most phone chargers have only 1 amp).
  • Superior Quality: Premium LG cells, cutting-edge circuitry and a sturdy gloss exterior ensure reliability and safety. To activate the LED flashlight, hold or double click the power meter button.
  • What You Get: Anker 2nd Generation Astro E4 Portable Charger External Battery Power Bank, Micro USB cable, travel pouch, welcome guide, our fan-favorite 18-month warranty and friendly customer service.
2 new from $22.99

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Frequently Bought Together

  • Anker Astro E4 Classic 13000mAh Portable Charger (2nd Generation High-Capacity External Battery Power Bank) with High-Quality LG Battery Cells
  • +
  • Anker 24W Dual USB Wall Charger PowerPort 2 (with Foldable Plug) for iPhone 6s / 6 / 6 Plus, iPad Air 2 / mini 3, Galaxy S6 / S6 Edge / Edge+, Note 5 and More
  • +
  • AmazonBasics Apple Certified Lightning to USB Cable - 6 Feet (1.8 Meters) - White
Total price: $41.97
Buy the selected items together

Technical Details

Color: Black
  • Size (LWH): 5.91 inches, 2.44 inches, 0.91 inches
  • Weight: 10.4 ounces
  See more technical details

Product Description

Color: Black

Anker Astro E4 13000mAh Classic Portable Charger
Supersized power in the palm of your hand.

From ANKER, America's Leading USB Charging Brand
• Faster and safer charging with our advanced technology
• 10 million+ happy users and counting

Detects your device. Delivers the fastest charge.
Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.

Huge Capacity
Enough power to keep you going for days. Charge an iPhone 5s almost six times, a Galaxy S5 over three times or an iPad Air once.

Slimmer, Sleeker
The new E4 weighs under a pound and rests nicely in your palm. Press the button to check your power level or hold to activate the flashlight.

Superior Quality
We use only premium LG battery cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety.

World Famous Warranty
At Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support.

For Optimal Use:
• Use the included cable, your original cable or a third-party certified one (such as MFi).
• Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the LG G4 / G2, iPod nano, iPod Classic, HP TouchPad, Asus tablets and some GPS and Bluetooth devices.
• To give your Astro E4 the fastest, safest recharge, use an Anker USB charger. Using an ordinary phone charger may cause overheating.

Product Details

Color: Black
  • Product Dimensions: 5.9 x 2.4 x 0.9 inches ; 10.4 ounces
  • Shipping Weight: 12.8 ounces (View shipping rates and policies)
  • Item model number: AK-79AN13K2-BA
  • Batteries 1 Lithium ion batteries required.
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (6,476 customer reviews)
  • Amazon Best Sellers Rank: #131 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • Product Warranty: For warranty information about this product, please click here

From the Manufacturer

Astro Mini External Battery 2nd Gen Astro External Battery 2nd Gen Astro E4 External Battery 2nd Gen Astro E5 External Battery 2nd Gen Astro E6 External Battery 2nd Gen Astro E7 External Battery
Color Selection Black, Silver, Pink, Blue, Gold Black, White, Blue, Green Black, White Black, White Black, White Black, White
Battery Capacity 3350 mAh 6400 mAh 13000 mAh 16000 mAh 20800 mAh 26800 mAh
# of iPhone 6 charges 1.2 2.5 5.0 6.2 8.8 10.0
# of iPad Air charges 0.3 0.5 1.0 1.3 1.8 2.0
# of USB Charging Ports 1 1 2 2 3 3
PowerIQ Technology
Max Charging Speed 1 Amp 2 Amps 3 Amps 3 Amps 4 Amps 4 Amps
Size 3.5 × 0.9 × 0.9 inches (lipstick) 3.7 x 1.8 x 1.0 inches (candybar) 5.9 × 2.5 × 0.9 inches (glasses case) 5.9 × 2.5 × 0.9 inches (glasses case) 6.5 × 3.1 × 0.9 inches (Galaxy Note 4) 6.5 × 3.1 × 0.9 inches (Galaxy Note 4)
Weight 2.7oz (egg) 4.8oz (baseball) 10.4oz (iPad mini) 10.4oz (iPad mini) 15.8oz (football) 15.8oz (football)

Customer Reviews

Top Customer Reviews

Color: 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!
2 Comments 358 of 381 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Color: Black
Length: 4:22 Mins
(Updated for the 2nd gen, 2014 model)
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.

If you 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.

- Glossy black finish, with glossy charcoal for the front and back
- Sturdy/solid (read: not flimsy-feeling, almost seamless) plastic enclosure.
- Great propotions; fits in the hand well and the narrow shape tucks in bags well.
- Comes with a nylon mesh drawstring pouch that fits it perfectly.


No need for outlets or long cables.
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. For example, I wanted to show my friend some videos on my iPad at his place, while we wait for another friend to arrive.
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14 Comments 586 of 633 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Color: Black
UPDATED REVIEW: Anker 2nd Gen Astro E4 13000mAh Battery

Anker sent me the 2nd Gen Astro E4 battery to review as the original review was getting a bit dated. In summary, the 2nd Gen Astro E4 definitely improved on a few items that were problematic with original version. Even if you are not upgrading from the 1st Gen, I believe the improvements are still worth considering compared to other batteries on the market. Improvements compared to 1st Gen Astro E4:

- Slimmer (But Longer) Body: While the 1st Gen Astro E4 was wide and shaped like a portable hard-drive, the 2nd Gen version is shaped like a flat glasses case (or a fancy pen case). This shape is much easier to slip into a front/rear pants pocket (albeit a loose fitting pair of pants). Both version weigh about the same.

- Increased Efficiency to 86% (11200mAh Actual): As stated in the original review, no batteries ever hit their capacity but this one came fairly close. This updated version hit 11200mAh while the original version only reached 9200mAh. I was able to charge my Nexus 5 phone fully about 5 times or my Nexus 7 tablet about 3 times. This will be my go-to battery for extended trips away from an outlet. For those of you using Apple's latest iPad Air, this will charge it fully about 1.2 times.

- 3A Maximum Output: With the new PowerIQ technology, either of the two USB ports can now charge to a total maximum of 3A. There is no longer a need to remember which port is the higher output port. Anker also increased the maximum to 3A for newer devices that support this amperage, which is a nice upgrade from the 2A of the 1st Gen.
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1 Comment 234 of 265 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Color: Black
First off let me say how impressed I am with this product - for real. Anker gave me this product in exchange for my honest feedback, but this thing is seriously unbelievable. It is incredibly small (4.1 x 3 x 0.9 inches) and very lightweight (13.3 ounces). I travel a lot so I am constantly on the lookout for something/somewhere to charge my devices whether on planes, out in the desert, in a cafe in Europe, on a long train ride, etc. I've found my new favorite. Even if I am just at home on the couch or lying in bed, I can have my power source close by so I am not constricted by a cord going to the wall. At 13,000 mAh this thing just does not stop. It holds an unsurpassed charge for longer than any other devices I've used. I've done some testing over the past few days. Here are the results:

1 full charge of the Anker Astro E4 13,000 mAh external battery lasted me three days using it solely:

*Charged my cell phone (Motorola Atrix) over night. The Astro E4 turns off when finished charging!
*Charged my friend's cell phone (Samsung Galaxy S3) for 2.5 hours during a movie at the theatre.
*Charged my Nexus 7 tablet over night.
*Charged my Motorola Atrix again last night to 73%.

*ALL before needing its first recharge!!*

My favorite features:
*Dual power ports - one for 1 amp devices and one for 2 amp devices
*Can charge multiple devices at once
*Comes with MicroUSB, MiniUSB, and Apple iPad plugs with a sleek, well-made USB charging cable
*Awesome soft, fabric bag to hold the unit and its accessories
*Built-in LED flashlight!
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2 Comments 96 of 106 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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