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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
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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
| 91 answered questions

Price: £49.99
Sale: £19.99 & FREE Delivery in the UK. Details
You Save: £30.00 (60%)
In stock.
Sold by AnkerDirect and Fulfilled by Amazon. Gift-wrap available.
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  • The Anker® Advantage: Join the 10 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.
£19.99 & FREE Delivery in the UK. Details In stock. Sold by AnkerDirect and Fulfilled by Amazon. Gift-wrap available.

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 + Anker® 40W 5-Port High Speed Desktop USB Charger with PowerIQ Technology for iPhone, iPad Air 2, Samsung Galaxy S6 / S6 Edge, Nexus, HTC M9, Nokia and More (Black)
Price For Both: £39.98

Buy the selected items together

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Colour Name: Black

Product details

Colour Name: Black
  • 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 (1,551 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

Colour Name: Black

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 10 million+ satisfied customers powered by Anker.

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

PowerIQ Detects your device. Delivers the fastest charge.
Exclusive to Anker, PowerIQ 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 (up to 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, Dell Venue 11 Pro, Asus tablets and some GPS and Bluetooth devices.
• Do not try to recharge the Astro E3 while it's charging a device, as this may reduce the battery's lifespan.


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

258 of 276 people found the following review helpful By Ssscrudddy on 18 Sept. 2012
Colour Name: Black 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.
Read more ›
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7 of 7 people found the following review helpful By Daniele Bonaldo on 24 July 2014
Colour Name: Black 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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1 of 1 people found the following review helpful By prisrob TOP 50 REVIEWERVINE VOICE on 17 Feb. 2014
Colour Name: Black
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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Colour Name: Black Verified Purchase
These things are actually fantastic. I was sceptical at first but threw caution to the wind due to the low price and my imminent departure from the country and I was not disappointed.

I'm aware that often portable charging devices can lack in pretty much every department and I'm especially distrusting of brand names I've never heard of before, but not this one. it does take some time to charge. From almost empty I usually have to put it on before I go to bed and then take it off charge when I get home the next day. But from that you can get around 4 and a half full charges for a smartphone. I've used it with an HTC One X, a Samsung Galaxy S2, Samsung Galaxy S4 and probably an iPhone or two at some point and it charges them no problem in the same amount of time you'd expect from charging at the mains. It has two USB ports, one optimised for charging Android phones and one for charging IOS devices (something to do with the way the different operating systems distribute power). It also holds the power very well.

Supplied, you get the unit itself, a nice cloth baggy and a USB cable. It does only come supplied with a micro USB cable, not an iphone cable but if Apple would get their figurative head out of their metaphorical arse and join the rest of the world using micro USB then this wouldn't be a problem. The whole thing is packaged up very nicely and comes with very clear and concise instructions and information (including detail about how the whole Android/Apple ports work).

Only bad thing I have to say is that the nice shiny finish does scratch up something terrible but obviously this doesn't impact the way the thing works so not a serious issue. Other than that this thing saved my arse more than once out in the styx in Northern Thailand with a dying phone battery. Actually bought my friend one as a present recently.
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