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Anker® Astro Slim3 6000mAh Ultra-Slim Portable Charger External Battery Power Bank with Built-in Micro USB Cable for USB Devices (Black)

by Anker
4.4 out of 5 stars  See all reviews (354 customer reviews) More about this product

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

  • The Anker® Advantage: Join the 6 million+ powered by Amazon's #1 charging brand.
  • Fast Charging: One USB port charges the iPhone 5s at full speed and one built-in Micro USB connector charges Android devices up to 1 amp. The Slim3 recharges in 5-6 hours via the included Micro USB cable and 1 amp adapter (not included).
  • Uber-High Capacity: Add almost three charges to an iPhone 5s, one and a half charges to a Galaxy S5, multiple charges to most other phones or one charge to an iPad mini.
  • Ultra Slim: Compact design (0.47in) and flat, rubber surface make it easy to hold and stack your device on top while charging. "Hideaway" Micro USB charging connector for Android reduces cable clutter.
  • What You Get: Astro® Slim3 Portable Charger External Battery Power Bank, Micro USB cable, welcome guide, our fan-favorite 18-month warranty and friendly customer service.

Special Offers and Product Promotions

Frequently Bought Together

Anker® Astro Slim3 6000mAh Ultra-Slim Portable Charger  External Battery Power Bank with Built-in Micro USB Cable for USB Devices (Black) + 30 PIN Dock Connector to Micro USB Adapter For Apple iPhone 4 4S 3GS iPod iPad 2
Price For Both: £21.98

These items are dispatched from and sold by different sellers.

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Product details

  • Product Dimensions: 13.4 x 7 x 1.2 cm ; 231 g
  • Boxed-product Weight: 259 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-79AN7909-B2A
  • Date first available at Amazon.co.uk: 18 April 2013
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (354 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.

Astro Slim3 Portable Charger External Battery Power Bank
Mobile power that stacks up - literally.

Fast Charging
Charge an iPhone at full speed via the USB port and Android devices at speeds of up to 1 amp through the built-in Micro USB charging cable.

Built-in Micro USB
For Android and other Micro USB devices, leave your cords at home and charge up with the Slim3's handy "hideaway" connector.

Uber-High Capacity
Packed with power, charge an iPhone 5s three times, a large capacity phone like the Galaxy S5 over one and a half times or an iPad mini once.

Slim & Stackable
Specially designed to suit a 4.7in smartphone. Just stack your device on top and enjoy uninterrupted use while charging.

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 tablets and some GPS and Bluetooth devices. The built-in Micro USB connector may not work with thicker bumpers or cases.

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews
30 of 34 people found the following review helpful
5.0 out of 5 stars Compact, Portable and Long Life Battery.... 11 Sept. 2013
By Dario
Size Name:6000mAh
I was supplied a sample for test and evaluation, and I promised that my review is fair and honest.

The product is aesthetically very nice and well done. It is accurate in all its details, and it is pleasant to the touch. It is very thin and it has the dimensions of a Samsung Galaxy S4. It has similar height, width and thickness. It is just a little bit heavier nut the weight is very light and everything is in favor of portability. You can easily carry with you in your pocket like a mobile phone without any problem.

The very simple package includes: the battery Slim3 of course, a little manual, a cable usb-microusb (pretty short, about 30cm) for charging and an 30pin adapter for iphone 3gs/4/4s (it only works for charging and not to synchronize). It has also a built-in and not removable micro usb cable that is very useful if you have a device that need a microUSB connector to be charged, a little less in other case, such as an iphone, because then you will need to connect an adapter. There is also a second USB port where you can connect, for example, or a second device to charge it simultaneously, or to connect the cable for iphone 5, for those who haven't an adapter or simply to connect a longer cable. Missing a bag to carry, not the battery because it is pocket size, but to bring the usb cable and the adapter.

It is extremely easy to use. You connect the built-in cable or a usb cable to the secondary port to a device, and without pressing any button, it starts the recharge. At the end of the recharge, the battery is automatically turns it off so to not consume and discharge the battery. It is equipped with 4 LEDs that indicate the state of charging of the battery while it is charging a device and when it is recharging itself.
Read more ›
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3 of 3 people found the following review helpful
4.0 out of 5 stars it really does hold its juice. 16 Jan. 2014
By RnB
Size Name:6000mAh
Pros; Good looking piece of kit, well made, very portable, super fast charge with on board cable, good delivery (traceable) and well packaged, gives my Xperia S three full charges.
Cons; it takes a long long time to fully charge (Zzzzzzz), it does get hot when charging phone (with on board able), no case.
Summary-I do like it, to be honest I can't do without it. However, due to the Cons it gets 4 stars
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1 of 1 people found the following review helpful
By wietske
Size Name:6000mAh|Verified Purchase
I own another ANKER product and was so impressed by it that I had to buy another one. This product was actually for the use of my husband as he travels a lot and uses his phone a lot on the go. This mobile charger is very light and easy and what makes it so great is the fact that it doesn't have any fiddly bits. The cable is attached to the charger and it is so sleek and easy to use!!! Initially we had a problem with the charger as it didn't charge our phones to 100% (only to 91%). I contacted the customer services and let me tell you - every review you have read before mine which commented on the customer service is absolutely right. ANKER has the best customer service that I have encountered in a long time!!!! They answered my complaint email within 12 hours and they dispatch me a new item within a day. The representatives are really friendly and genuinely seem to care and help. It is a shame we had a little trouble with the product at first, but since we received the replacement we have been happy chargers! No complaints and the charger is working its magic now. I cannot recommend this product enough - GET IT, YOU WON'T BE SORRY!
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1 of 1 people found the following review helpful
5.0 out of 5 stars My top purchase for travelling! 23 May 2014
By James
Size Name:4500mAh|Verified Purchase
I have just returned from a 5 month trip with this device and I must say it was one of the best things that I bought!

Never once was I left stranded in the middle of no where or at an airport with no battery. The two things that provided value for me were the form factor; it is similar in dimension to my phone which means I can have both together in one pocket. Sure there are higher capacity powerbanks but they are also not as pocketable.

The second is the short micro USB that is ingeniously integrated into the device. This means that unlike other powerbanks, you don't need to carry a long cable around with you (there is also a standard USB socket)

I bought the 4600mAh version... I feel that if I were to buy again I would opt for the higher capacity model as its the same size only with more juice.

Overall, great design, great functionality and a must buy for when on long travel journeys IMO.

Just a little pro-tip; A rubber silicone case for the Moto G phone fits this device like a glove if you want a bit of bump protection.
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29 of 34 people found the following review helpful
Size Name:6000mAh|Verified Purchase
This product is noticeably more expensive than the slim2; however, it appears to be the exact same product with slightly different labeling. The previous one is labeled as having a capacity of 4500mAh (unknown voltage), while the new one is labeled as having a capacity of 6000mAh at 3.7V. Some basic maths and knowledge of physics tells you that the two capacities are the same. Power*time=voltage*current*time

Misleading labeling does not end here. The product is specific to out-put 1A, which is a lot. However, this is at 1.5V, which is 300mA at 5V. 5V is the normal USB voltage.

I don't want to bother sending this back and buying the slim2 which is 7GBP cheaper. I do, however, feel properly ripped off.
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Most Recent Customer Reviews
1.0 out of 5 stars A year and half's life cycle
It was all good for a year and half. But actually after few months the led indicated wasn't accurately shows the remaining battery. Read more
Published 22 hours ago by wei guo
4.0 out of 5 stars Great little device, but mine seems to have come from a faulty batch.
As regards general review of the item, it's a great little device, similar size to my Samsung S4, and holds more than 1 full charge (haven't tested to see how many charges). Read more
Published 4 days ago by baldmosher
3.0 out of 5 stars like not love it
I was a little disappointed by this.

Firstly is takes a couple of charges to get going, so don't be alarmed when the first time you use it you get less than a half phone... Read more
Published 5 days ago by Andy CI
5.0 out of 5 stars Five Stars
Fantastic, useful and great material quality
Published 6 days ago by Muhaed Alali
4.0 out of 5 stars Good service. As for the battery
Had a problem with first item, it stopped working after a couple of charges. I contacted the manufacturer and the problem was promptly solved, they send me a replacement. Read more
Published 7 days ago by Roger
5.0 out of 5 stars Great product, does what is says
Great product, does what it says and it is "ultra slim" You could even carry it in your pocket. (The same size as my Moto G)
Highly recommend.
Published 7 days ago by bhfez
4.0 out of 5 stars Great product, works wonders
Great product, works wonders. The micro usb output on my product didn't work with android devices but the USB port still worked so its fine.
Published 8 days ago by Nasweb
3.0 out of 5 stars Great product, but integrated cable let me down..
The reason I bought this charger was because of its convenience of charging my phone in my pocket. The slim form factor and (mainly) the integrated charging cable. Read more
Published 10 days ago by O. Hui
2.0 out of 5 stars All three batteries were faulty!!
I have bought this same Anker battery three times (!!) rather naively putting my trust into the good reviews and the company's reputation,as well as being pushed by the obvious... Read more
Published 10 days ago by GDD
2.0 out of 5 stars a poor 2nd impression
I lost my first anker and was happy with it beforehand. So I bought another , it doesn't work properly. Read more
Published 12 days ago by Mr C Lavery
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