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Anker® 2nd Gen Astro E3 10000mAh Portable Power Bank External Battery Charger with PowerIQTM Technology for iPhone 5S 5C 5 4S, iPad Air mini, Galaxy S5 S4 S3, Note 3 2, Tab 4 3 2 Pro, Nexus, HTC One, One 2 (M8), Motorola Droid, Moto X, PS Vita, Gopro, and other USB-charged devices

by Anker
| 80 answered questions

Price: £49.99
Sale: £21.99 & FREE Delivery in the UK. Details
You Save: £28.00 (56%)
In stock.
Sold by AnkerDirect and Fulfilled by Amazon. Gift-wrap available.
  • The Anker® Advantage: Join the 6 million+ powered by Amazon's #1 charging brand.
  • Exclusive PowerIQ™ Technology: Detects your device to deliver its fastest possible charge speed up to 3 amps.
  • Ultra-High Capacity: Charges the iPad Air almost once, the Galaxy S5 two and a half times, the iPhone 5s four and a half times and other smartphones multiple times.
  • Most Compact: Slim, sleek, smartphone-like design featuring a 4-LED power meter. Recharges in 6 hours with a 2 amp adapter (not included) and the included Micro USB cable.
  • What You Get: Anker® Astro E3 Portable Charger External Battery Power Bank, Micro USB cable, travel pouch, welcome guide, our fan-favorite 18-month warranty and friendly customer service.

Frequently Bought Together

Anker® 2nd Gen Astro E3 10000mAh Portable Power Bank External Battery Charger with PowerIQTM Technology for iPhone 5S 5C 5 4S, iPad Air mini, Galaxy S5 S4 S3, Note 3 2, Tab 4 3 2 Pro, Nexus, HTC One, One 2 (M8), Motorola Droid, Moto X, PS Vita, Gopro, and other USB-charged devices + iZKA® - Premium UK Micro USB Mains Charger Power Supply For Anker Astro E3 10000mAh / E4 13000mAh / E5 15000mAh Portable Power Bank - (AC 1A / 1000mAh)
Price For Both: £26.98

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Product details

  • Product Dimensions: 13.7 x 6.7 x 1.7 cm ; 231 g
  • Boxed-product Weight: 340 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: AK-79AN7917-BA
  • ASIN: B0063AAIRG
  • Date first available at Amazon.co.uk: 3 April 2012
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (1,376 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

ANKER: Amazon's #1 Charging Brand

• The highest average review rating of any charging brand.
• One in three chargers sold on Amazon is from us.
• Join the 6 million+ satisfied customers powered by Anker.

2nd Generation Astro E3 Portable Charger External Battery Power Bank
Portable powerpack perfection.

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

Ultra-High Capacity
Charge an iPhone over four times, a large capacity phone like the Galaxy S5 two and a half times or most tablets at least once.

Most Compact
The size and feel of a smartphone. The E3 is unobtrusive, lightweight and the most compact among batteries of this capacity.

Premium Performance
Industry grade materials, premium circuitry and a 92% efficient battery cell (10% above the industry average) ensure complete reliability.

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 iPod nano, iPod Classic, HP TouchPad, LG G2, Asus and some GPS and Bluetooth devices.


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

256 of 273 people found the following review helpful By Ssscrudddy on 18 Sep 2012
Verified Purchase
Anker® Astro3 10000mAh Dual 2A/5V USB Output & 9V/12V DC Output External Battery Pack Charger.

Edit Please note this is for the older version, NOT for the new E version (despite what the Amazon page says). Also I corrected my maths, as pointed out by Ms L Atkins. Thanks for that, I missed out some brackets!

So how many times can you charge your phone? This battery is 70% efficient (nothing is ever 100%). According to their website (ianker.com) use this formula.

Capacity of the External Battery * 70% / Capacity of the Mobile Phone

So for my phone, HTC One V (1500 mAh battery) - (10,000 * 0.7) / 1500 = 4.66, or 4 full charges from 0% to 100% & 1 more charge from 0% to 66%

In testing I achieved 4 full charges from 0% to 100%, & 1 more charge from 0% to 54% before the Astro 3 was totally flat.

It took 2 1/2 hours to fully charge my phone using the S USB slot. It took 3 hours to fully charge my phone using the I USB slot.
(Using the wall charger that came with my phone, it takes 1 1/2 hours to charge my phone from 0% to 100%)

2 USB slots can charge up to 2A (@5V). USB Slot I is for Apple devices, USB Slot S is for Samsung (read Android) devices. Both slots work for any USB device I have tried that is 5V.
This also has a DC out slot that is switchable between 9V & 12V.

Your device will only draw UP TO the Amps that it is designed for. In other words if your wall charger is 1A 5V, it is ok to use this external battery, your device will only draw 1A. The external battery itself can supply up to 2A depending on your device, just make sure its 5V.

I also tried charging my netbook, an EeePC (1000HE) made by Asus, with an 8400 mAh battery that lasts for around 7 hours.
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3 of 3 people found the following review helpful By Matheus Ferreira on 8 Oct 2014
Verified Purchase
Note: There is a more recent version of this product, the Astro E4, which is 13000 mAh and is at the same price as this one. Buy that instead while it's time!

Essential for anyone looking to spend weeks away from home without much access to outlets, this portable charger is ideal for anyone, be for a simple camping or for traveling to other countries. The packaging and presentation is on par with high-class products (Beats headphones, Iphones), the device itself has an alluring glossy finish all around, doesn't weight to much, fits perfectly in any pocket, comes with a travelling pouch and, of course, gives your electronics all the juice they might need.

With 2 USB outputs, it can easily charge yours and your friend's smartphones simultaneously, or pretty much anything that has USB ports (portable game consoles, GPS and even digital cameras), and yes, they charge up quite quickly, so the PowerIQ isn't just a marketing feature to draw cash out of costumers. I can easily recharge my smartphone (an old Xperia L) and my iPod touch twice each with a single charge. Indeed, it takes more than a night's sleep for it to charge completely , but once charged, you have pretty much a portable outlet that's easy to use (just a single button press to check battery level or enable charging), stylish, portable and quite sturdy as well.

Overall, if you really want a power bank, search only from banks from 10000mAh like this one. Even if there are smaller ones available cheaper, trust me, you WILL want more than "just to charge my phone once/twice".
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5 of 5 people found the following review helpful By Daniele Bonaldo on 24 July 2014
Verified Purchase
I'm very satisfied about this external battery.
It is very handy during conferences or when I'm moving a lot during the day and I don't have the chance to connect my smartphone to a power source.
The 10000 mAh capacity is enough for at least 4 charges of my Nexus 5 and the output (3000 mA) is very fast: it is easily possible to use the smartphone with highly consuming applications, such as GPS navigation, and still charging it using this battery.
I highly recommend it.
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2 of 2 people found the following review helpful By prisrob TOP 500 REVIEWERVINE VOICE on 17 Feb 2014
I have several mobile devices and take two to three with me when I travel my iPhone, iPad, and/orkindle. I try to find outlets at airports to plug them in, but so do the rest of the travelers. Each device's battery has a different length of life, my iPad battery runs out more quickly, followed by my iPhone and then my kindle. By carrying all three, I hoped that using them one by one I would have a mobile device for my East to West Coast travels. Now, we have external battery chargers, and they are a life saver.

This zanier battery pack came well packaged, easy to open and encased in a strong plastic case. The battery has an on/off button and also has auto shut off. A blue LED indicates when the battery is turned on. While you are charging your device the LED is on. This battery pack is a very good size, small, light weight, and can be easily placed in a purse or pocket.

This battery charger is ideal for charging a smartphone to a full charge more quickly than others I have used, and my iPad much more slowly. . My iPhone is an older model, and the battery runs out more quickly. I keep this portable power bank with me fully charged to use when my iPhone needs re-charging. This battery uses Lithium Ion battery technology and carries a 10000mAh capacity. I keep this portable power bank in my purse with the charging cable, so that it is convenient for use at any time. The battery pack is white with a green strip on either end, quite attractive. You must provide your own able to fit your mobile devices. Note: I was provided this product to use and review.

Recommended. prisrob 02-17-14
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