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Anker® Astro Slim3 6000mAh Ultra-Slim Portable Power Bank Pack External Battery USB Charger for Samsung Galaxy S5 S4 S3, iPhone 6 Plus 5S 5C 5 4S, iPad Air 2, mini 3, Note 4 3, HTC One, Motorola Droid, MOTO X, LG Optimus, most other USB-charged devices (Apple adapters - 30 pin and lightning, not included)

by Anker
4.4 out of 5 stars  See all reviews (316 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.
Want it tomorrow, 25 Nov.? Choose Express delivery at checkout. Details
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Technical Details

  • Dual ports capable of supplying simultaneous, full-speed charges (1A each) to devices. Made with Grade A cells and premium microchips.
  • Packs a punch: enough power for 3 charges or more on most phones, while compact design (0.47in) and matte surface allow for easy stacking during use.
  • Micro USB hideaway cable reduces obstruction and the number of cords in your bag; USB output also available for iPhones or other USB-friendly devices.
  • Charges via Micro-USB power wire (included) or AC adapter (not included). Input: 5V / 1A (5-6 hours to charge via 1A adapter); Output: USB 5V / 1A + 1A.
  • Package contents: Astro® Slim3 External Battery Pack, micro USB cable, instruction manual.

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Frequently Bought Together

Anker® Astro Slim3 6000mAh Ultra-Slim Portable Power Bank Pack External Battery USB Charger for Samsung Galaxy S5 S4 S3, iPhone 6 Plus 5S 5C 5 4S, iPad Air 2, mini 3, Note 4 3, HTC One, Motorola Droid, MOTO X, LG Optimus, most other USB-charged devices (Apple adapters - 30 pin and lightning, not included) + 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
  • ASIN: B00CEZJT2E
  • Date first available at Amazon.co.uk: 18 April 2013
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (316 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

Mobile power that stacks up - literally.

Slimmer and stronger.
At 0.47in, Anker's Astro Slim3 comes with enough power for 3 or more charges to most smartphones in a compact, easy-to-grip case. Sized especially to stack behind your 4.7in smartphone for uninterrupted phone use while charging. An LED column unobtrusively lets you know just how much juice is left.

Say goodbye to knots.
Who doesn't hate tangled cables? With an intuitively-sized micro USB cord for Android, the Slim3 allows you to carry your power all-in-one. Using an iPhone? Plug into the USB port and charge up via your OEM cable. Free yourself from cords and get back to what's most important: life.

No expense to speed.
What's better than a high-capacity battery that slides into your pocket on-the-go? One capable of simultaneous, full-speed charges. Both ports supply 1A of power with complete safety to your phones, so you can power up in no time and make the most of your day.

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. The built-in Micro-USB cord may not be able to work with thicker bumpers or cases.
• The included Micro USB cable is compatible with the Samsung Galaxy S5, Note 3 and other Micro USB 3.0 devices. To connect, insert the cable's Micro USB tip into the larger of the two connection ports on your device.
• 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

Most Helpful Customer Reviews
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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26 of 30 people found the following review helpful
5.0 out of 5 stars Compact, Portable and Long Life Battery.... 11 Sep 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.
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18 of 21 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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14 of 17 people found the following review helpful
5.0 out of 5 stars Nicely designed product 20 Aug 2012
By mwarner
Size Name:3200mAh White|Verified Purchase
I contemplated a number of products before finally deciding on the 3200mAh Anker. I intend this to provide my phone with extra charge whilst out walking & using the phone as a GPS - I tend to find that after 5-6 hours of this kind of heavy use my phone runs out of juice!

My requirements were:

1. Able to provide roughly one full charge of my Samsung Galaxy Note (2500mAh battery)
2. To be slim enough to not really notice you are carrying it in a pocket (thickness is more important than width and height here). I compared it to an iPhone 4S and it is slightly shorter, but pretty much the same width and depth.

I also liked the following about this item:

1. It had a built-in light, which I will actually find quite useful
2. It had a built-in Micro USB cable, making it more compact than having to carry around a separate cable.
3. The price was very reasonable

Once in hand, I was impressed with it's build quality and weight and, comparing it to my workmate's 5000mAh I was pleased I ordered the lower capacity version - mostly due to the excellent form factor.

Today I decided to perform a test to see how efficient battery to battery power transfer is. I ran my phone down until it asked for power & charged it until the (fully charged) extended battery ran out of juice.

The recharge took 3 hours and took the phone from 16% to 87% battery before running out of power. The phone was on during this time - the previous 3 hours had used 16% battery, so I assumed that the battery usage over the charge period would be the same.
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5.0 out of 5 stars A Life Saviour for Your Phone 22 Oct 2014
By Austen
Size Name:6000mAh|Verified Purchase
Excellent and well designed. It is about the same size as a normal smart phone.

It charges/recharges at about 0.5% per minute; e.g. it increases the charge in my Samsung Core phone by 50% in 90-minutes.

It will charge a normal smart phone about twice so that should be enough for travelling and if you get bored at an airport and use your phone heavily to watch videos or listen to music. I bought this because my phone was flat when I arrived at an airport and could not call my wife, nor the office, nor the airport car park company to come and collect me. So this 'power bank' will save me in future.

The cable/mini connector tucks nicely away for travelling so it will not get lost. The case is matt black.

It is supplied with a separate cable to connect to a USB charger but a charger is NOT supplied. Apparently you can plug into your PC USB to charge up this battery but a separate small 5v USB charger is far more convenient both when travelling and at home/office.

The price of £20 is about average for 6000mAh power banks which are heavily discounted nowadays owing t0 the intense competition.
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Most Recent Customer Reviews
4.0 out of 5 stars but I could be wrong) I'd defiantly recommend getting one
I bought two of these, one for me and one for a friend. Mine has held up perfectly and have had no issues. Read more
Published 6 days ago by linmcg
5.0 out of 5 stars Slim, comfortable in a pocket and charges well
I trust Anker, I have bought many of there products with no problems. However, if I had a problem, I would also trust Anker's customer services to deal with it (as they appear to... Read more
Published 11 days ago by fredjk351
3.0 out of 5 stars solid performance. bigger than most phones.
worked well at first, then started to lose capacity. now, the plug is not holding, and replacing the port on the phone made no improvement.
Published 13 days ago by Robert Orlando
2.0 out of 5 stars It was ok for the first 2-3 months and when ...
It was ok for the first 2-3 months and when i stored it for a few months - it does not even charge anymore - no lights, nothing
Published 16 days ago by Albert
4.0 out of 5 stars Great size and weight, good product!
Great product, I have used it many times and it has provided me with extra battery life, up to 2.5/3 charges. Read more
Published 18 days ago by aboooday
4.0 out of 5 stars OK, but built-in micro usb cable not very durable.
Update 14/11/14 - So, Anker saw my 3-star review below, and sent me an email asking if they could replace my unit. Superb customer service. Read more
Published 1 month ago by Mr. N. Webber
5.0 out of 5 stars Three Stars
I love the design but the built-in usb is not stable
any way it can be used.
-------- --------
have to change my comment to 5 stars. Read more
Published 1 month ago by moca
1.0 out of 5 stars Bought one.. It wouldn't charge anything through the ...
Bought one.. It wouldn't charge anything through the attached plug, only through external socket and extra lead. Thought it must be faulty so got it replaced. Read more
Published 1 month ago by David
2.0 out of 5 stars One charge only
You can get about one full charge from empty or 14% HTC One from a single battery charge. It makes your phone really hot and causes lag and performance issues. Read more
Published 1 month ago by Zubba
4.0 out of 5 stars I like it
Love this item. Saved my life couple of times now... but it's a bit heavy, takes quite alot time to charge, and all it came with is with short USB - and charging from laptop takes... Read more
Published 1 month ago by Vadim
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