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Anker Astro E4 13000mAh External Battery

Anker Astro E4 13000mAh External Battery

Charger- 40W 5-port desktop charger

Product Description

With such massive capacity, in such a compact package, the Anker® Astro E4 is perfect for flights, road trips, or just any time you’re away from an outlet.

Enough power to go around.

Marooned? In transit? Forget your OEM adapter? With the Anker® Astro E4, prolong your battery life multiple times, wherever you are. Holding enough power to charge most smartphones 7-8 times, keep your gadgets going for days and still have juice left to share.

Strong but never slow.

In addition to capacity, the Anker® Astro E4 sports two concurrent, high-speed ports. So whether you're charging an Apple or Android device, you'll get the most out of your technology. We've also included connective adapters to ensure compatibility with most devices.

Designed around the details.

Just because the E4 packs a punch, doesn't mean it can't look nice. We went with a smooth, ivory/ebony finish to keep you traveling in style. Simple, unobtrusive features, such as one-touch status LEDs and a built-in flashlight, give you everything you need out of a battery without sacrificing aesthetics.

For optimal use

- For simultaneous, max-speed charging of your Astro and other devices, check out Anker’s new line of 18W / 3.6A car and home adapters.
- 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.
- Compatible with all Apple and Android smartphones, tablets and other 5V input USB-charged devices. The iPod nano and some GPS and Bluetooth devices are not supported.

Popular Compatible Models

Apple: iPhone 5S, 5C, 5, 4S, 4, 3GS / iPad, iPad 2, iPad 3, iPad 4, iPad mini / iPod (Apple adapters not included)
HTC: One Max, One, One X, S, V / Sensation, Sensation XE XL / EVO 4G / Radar 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire X, C, V, HD, S, Z
Samsung: Galaxy S4 / S4 mini / Galaxy S3 / Galaxy Note 3 / Galaxy Note 2 / Galaxy S2 I9100 / Galaxy S I9000 / Verizon Galaxy S3 I535 / AT&T Galaxy S3 I747 / Sprint Galaxy S3 L710 / T-Mobile Galaxy S3 T999 / T-Mobile Galaxy S2 T989 / AT&T Galaxy S2 I777 / AT&T Galaxy S2 Skyrocket SGH-I727 / Galaxy Nexus / Focus S / Infuse (Galaxy Note 10.1, Tab 2, Tab 7.0 not supported)
Motorola: X Phone, Droid Razr, Bionic / Atrix 2 / Triumph
LG: Nexus 4, Optimus 4X, 2X, V, S, T, 3D, 7
Nokia: Lumia 1020 920 820 900 710 800 / N8 / N9
Others: Blackberry Z10 Torch Curve 9900 9360 9320 / Sony Ericsson Xperia Arc S, Sony Xperia Z,X10 / PSP / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle, Kindle Fire,Nexus 7

Customer Reviews

David Paine
  • Very nice
  • This is small and lightweight enough that I could easily carry in my backpack on a recent trip I took where there was no power. I used it to keep my phone charged, but for some reason that I have yet to figure out it would not charge my camera. I will try some different cords and see if that makes a difference.
  • 2014-04-18

Ron Corriveau
  • Works as advertised !
  • I recharged by iPhone 4S 4 times and my IPad Air once before I had to recharge the battery. Recommended !
  • 2014-04-18

D. OBrien BSDetector
  • Fair price. Works as it should. Lots of juice.
  • This is my first portable charger. It works great. Very portable. Nice storage bag. Comes with the cable. Has 1 and 2 amp options.
  • 2014-04-18

William Petell
  • Get alternative power supply
  • This is a great alternative power source it easily sustains my iPhone and iPad for several days should I not be able to recharge.
  • 2014-04-17

  • Better than expected
  • For a good battery backup, with an iPhone and a short cable it fits in a pocket while connected. Charges several times and indespensible when the phone's batter is getting old.
  • 2014-04-17
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Customer FAQ

Q1.  Can I use USB cables othan than those provided with my Anker external battery?
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.
Q2.  Does it work with the new iPhone 5s, 5c?
Yes. But the Apple connector is not included. Please use your device's original cable.
Q3.  Anker external batteries' efficiency.
ALL external batteries lose power due to voltage conversion and circuit resistance.

Approximately 20% of Astro 2nd Generation external battery’s total capacity is consumed, including power lost from circuit heat and voltage conversion within the external battery (approximately 6%) and the charging cable and your device (approximately 14%). This efficiency rate is 15% higher than the industry average of 35%.

Older Astro batteries have lose approximately 30%.

According to industrial standards, all external batteries are labeled based on their raw cells capacity not efficiency. Like others, we are following this standard.
Q4.  How long will the battery lasts while not in use?
Generally, most of our external batteries' static power consumption is lower than 100uA, which will take between 3.5 and 20 years to drain the battery completely.

However, the chemicals within the li-ion battery will gradually become less active over prolonged periods without use. Most will die in 2 years of inactivity.

To extend your battery's life:
1. Charge and recharge it at least once every 3-4 months.
2. Do not over-charge or over-discharge it. It is best to keep it charged between 5%-95%.
Q5.  Can Anker external batteries be used for international travel?
Yes. Be sure the USB adapter you bring with is compatible with the voltage of the country you will be traveling to. An adapter's voltage input is usually printed on the adapter.
Q6.  Can external batteries be taken on board airplanes?
Yes, all Anker external batteries can legally and safely be taken on board airplanes. Here are the relevant requirements:

Quoted from Federal transportation security rules (Effective January 1, 2008):
Lithium ion batteries (a.k.a.: rechargeable lithium, lithium polymer, LIPO, secondary lithium).
-Passengers may carry consumer-sized lithium ion batteries [no more than 8 grams of equivalent lithium content or 100 watt hours (wh) per battery]. This size covers AA, AAA, 9-volt, cell phone, PDA, camera, camcorder, Gameboy, and standard laptop computer batteries.
-Passengers can also bring two (2) larger lithium ion batteries (more than 8 grams, up to 25 grams of equivalent lithium content per battery) in their carry-on. This size covers larger extended-life laptop batteries. Most consumer lithium ion batteries are below this size.

Anker's largest external battery is currently the Anker Pro 20000mAh (74 wh) which is lower than the above 100 wh limit.
Q7.  What can I do if I lose the provided accessories?
Please check to see if you have extras or contact us via email at for help.
Q8.  Anker external batteries' compatibility
Anker external batteries are compatible with Android and Apple smartphones and tablets except Asus devices ( Apple connectors are not included, please use your devices original cable).
Q9.  Can it be charged and charge other devices at the same time?
Yes, this battery can simultaneously charge and discharge. However, constant pass-through charging may affect the battery’s lifespan.
Q10.  Do I need to press the power button when charging other devices?
Q11.  Do I need a certain type of charger to recharge this Anker external battery?
No, most USB AC chargers or a laptop or PC's USB port can recharge this battery. A minority of USB AC adapters are not compatible. If you find your charger is not working, please try a different charging option.
Q12.  How long does it take to fully charge this Anker external battery?
8-9 hours with a 1.5A output charger. Using a charger with a lower current output will prolong the charge time.
Q13.  How to turn the flashlight on and off?
Please press the power button twice to turn the flashlight on or off.
Q14.  Can I charge two devices at the same time?
Yes. But please note that when using 2 output ports simultaneously, the total output current will not exceed 3A.
Q15.  Can it charge Samsung or Asus tablets?
Q16.  What if the Astro E4 fails to recharge?
a. Check that the adapter is connected securely, or replace it if the current one is not functioning normally.
b. Check that the USB cable is connected securely, or replace it if the current one is not functioning normally.
c. Please email us at duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q17.  What if the Astro E4 fails to charge other electronic devices?
a. Check that the connection between the Astro E4 and the electronic device is secure, or replace the cable if the current one is not functioning normally.
b. Check that the Astro E4 still holds a charge, and recharge it when the remaining power is low.
c. Check that the Astro E4's voltage is compatible with your device's.
d. Please email us at duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q18.  How can I identify the voltage specification for my device?
Please refer to your device's instruction manual, product labeling, or adapter to find this information.

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Latest Post

Note n7000

İs it compatible with note n7000?

Replies(2) Collapse Report as spam Mar 31, 2014 at 8:26 AM
Yep! You'll be absolutely fine charging your Note N7000 with the E4.
Reply Report as spam Apr 8, 2014 at 4:57 AM

Yes it will charge your Note phone with no problem.

Just use the supplied USB cable from your phone and you're good to go!

Reply Report as spam Mar 31, 2014 at 7:10 PM
Alternative sources

I continue to be pleased to find more Anker products available at Newegg, like this one.  Kudos!

Replies(9) Collapse Report as spam Mar 31, 2014 at 1:04 AM

Quote From gherardini:under current law they would have to create a physical presence in the buyer's state. But note that Amazon doesn't collect tax on everything they sell.

Reply Report as spam Mar 31, 2014 at 12:16 PM

Newegg is great. 

I like Newegg better than Amazon.

No tax and free 2 day shipping with Shoprunner!

Reply Report as spam Mar 31, 2014 at 1:06 AM

Amazon's free shipping will soon cost $100 per/year.  Granted that brings other benefits.  Sadly only a few Anker products are currently available at Newegg but I trust Anker is in negotiations.

Reply Report as spam Mar 31, 2014 at 1:11 AM

Newegg's Shoprunner free 2 day shipping costs much less and Shoprunner is usuable at many more retailers than just Newegg, they're accepted by hundred of retailers too

Reply Report as spam Mar 31, 2014 at 1:13 AM

Really? Never heard of Shoprunner but I get free shipping, no tax and usually get pretty fast delivery.  They must like me :-)

Reply Report as spam Mar 31, 2014 at 1:16 AM


Well you're missing out on something better than Amazon prime for shipping

Reply Report as spam Mar 31, 2014 at 1:24 AM

Quote From HammerNexus: ??

Reply Report as spam Mar 31, 2014 at 1:26 AM

Quote From gherardini: I don't think they can for now because Newegg only has warehouses in New Jersey, Tennessee, and California.

As long as you don't like in one of those states, you're golden for now smiley


So glad I don't because my tech addition would cost a fortune on Taxes.


Hope Fry's or Microcenter starts carrying Anker products soon too. 

Reply Report as spam Mar 31, 2014 at 7:22 PM

Sadly, one day they'll find a way to get smaller online retailers to collecting tax, too. Just like Amazon. But let's enjoy it while we can and wait for bigger selection. Yay!

Reply Report as spam Mar 31, 2014 at 8:44 AM
Issues with 2A port.


I have a Nokia Lumia 810. I can try any USB cable possible, but it just won't charge off the 2A port on this device. It will, however, charge just fine, with any USB cable off the 1A port. Is this a common issue with charging smart devices off the 2A port, or is my phone being silly?


Replies(6) Collapse Report as spam Mar 21, 2014 at 2:32 PM

It doesn't sound like your phine, it sounds more like the 2A USB port is bad. Will anything charge off of the 2A port? IF not then send a message at and let them know. Anker's pretty good about standing behind their devices.

Reply Report as spam Mar 21, 2014 at 2:39 PM

Try a different USB cable. Some cables can't handle 2A

Reply Report as spam Mar 21, 2014 at 7:05 PM
Christian Wacker

Quote From gherardini:It looks like my Nexus 7 seems to charge off the 2A port, as long as a bunch of simple things like a keychain camera. Just the phone that isn't charging.
This was also replaced by Anker for this issue earlier (The 2A port was loose, so I assumed that it just wasn't making contact) I will probably have to test this with another few smartphones to see if it's an issue with it charging at 2A, if it's how the charger is detected by the phone, or some other issue.

Reply Report as spam Mar 21, 2014 at 8:30 PM

If the Nexus is charging fine, then it's probably not the battery. Once again, check cables and for loose connectors on your phone

Reply Report as spam Mar 21, 2014 at 11:11 PM
Christian Wacker

I have a few different cables. The Nexus will charge fine with the same cable that won't charge the Nokia. I will test later today with a few other Nokia phones that I have in storage, and see what happens. Could be this specific model that has issues with the battery.

Reply Report as spam Mar 22, 2014 at 12:03 PM

Quote From Christian Wacker: Not sure. But I've always had good luck with Anker products. Never had a defective one.


If you do have a problem and it doesn't work, just contact Anker adn they'll replace it. 

Anker has a great 18 month warranty plan

Reply Report as spam Mar 22, 2014 at 3:04 PM
Galaxy Note 10.1 2014 edition
Hi I want to use this external battery for both my samsung galaxy s2 and the new Galaxy Note 10.1 2014 edition. From your information it looks like that would be a problem as the Galaxy Note 10.1 is not supported. Why is it not supported and what product would you recommend? Kind regards J
Replies(2) Collapse Report as spam Feb 21, 2014 at 9:31 AM
Christian Wacker

It should charge just fine, as long as the tablet is able to charge on at least 2 amps of power. This particular battery was released before the 10.1 2014 edition tablet was, so the product page has (probably) yet to be updated to include it.

Reply Report as spam Mar 21, 2014 at 2:34 PM

It is supported and will charge fine. The product page wasn't updated. But your tablet should have no problem charging with the micro USB cable and this battery! smiley

Reply Report as spam Mar 31, 2014 at 7:25 PM
Odd LED Pattern...
I use the E4 to charge my HTC One X. Sometimes when I connect it using 1A port and supplied cable and then turn on the E4. Each LED lights in turn on the E4 then goes out. The phone then does not charge. There is no mention of this LED pattern in the manual. What does it mean?
Replies(2) Collapse Report as spam Jan 26, 2014 at 7:13 AM
Thank you for contacting us! In order to assist you with the problem of your Astro E4, would you please contact our customer support at : Please be assured that you will receive quick and hassle-free service.
Reply Report as spam Feb 8, 2014 at 4:16 AM

Hmm that's really strange, did you get it fixed?

Reply Report as spam Mar 31, 2014 at 7:35 PM
Will this work with microsoft surface?
Will this work with Microsoft Surface?
Replies(2) Collapse Report as spam Jan 23, 2014 at 4:26 PM
Yes, just utilize the 2A port of this external battery to charge the Surface.
Reply Report as spam Jan 23, 2014 at 5:34 PM
Sorry, none of our products are currently compatible with the Microsoft Surface.
Reply Report as spam Jan 27, 2014 at 1:52 AM
asus nexus 7
my tablet is asus nexus 7, is it compatable?
Replies(2) Collapse Report as spam Jan 2, 2014 at 2:29 PM
Yes it is definitely compatible with that too as it uses a micro usb to charge.
Reply Report as spam Jan 2, 2014 at 3:12 PM
Thank you for contacting us! We would like to confirm that our Anker Astro E4 13000mAh External Battery is compatible with the Asus Nexus 7.
Reply Report as spam Jan 12, 2014 at 9:11 PM
Is it compatible with the lg optimus slider or Samsung s4
Replies(2) Collapse Report as spam Jan 2, 2014 at 10:09 AM
Yes it is certainly compatible with your two phones as they can be charged using USB cables.
Reply Report as spam Jan 2, 2014 at 10:12 AM
Yes, it is compatible.
Reply Report as spam Jan 12, 2014 at 8:55 PM
Time too short
A reception two LEDs do not work, you can not see properly or were loading (or unloading). In addition to the problem of the LED, after only two applications it is not functioning properly. Summary: Poor quality for the Anker brand! Remeber ... and share!
Replies(3) Collapse Report as spam Dec 29, 2013 at 7:41 PM
Please contact for a warranty replacement
Reply Report as spam Dec 29, 2013 at 9:42 PM
Also the 2 LEDs were not lit up when you got it. Did you try charging it to see if they would light up when full?

Does it not charge now?
Reply Report as spam Dec 29, 2013 at 9:44 PM
Thank you for contacting us. We are extremely sorry to hear about your negative experience. Would you please contact the Anker service team directly at We stand behind our products and will take care of the situation quickly and hassle-free. In your email, please provide your amazon purchase order and the serial number of your product so that our team can better assist you.
Reply Report as spam Jan 9, 2014 at 10:12 PM
My device is charging irregularly
I have the anker Astro E4 13000 external battery pack and lately when i plug it into my computer, it does not charge. I have checked and the cable is plugged in properly, but many times the lights will not flash as if it is charging, or it will stop flashing at random times even though the device is not fully charged.
Replies(2) Collapse Report as spam Dec 26, 2013 at 6:57 PM
Your computer does not provide enough power to charge this device. You need to plug it into the wall with a wall usb power adapter.

This requires 5V / 1.5A input to be charged. Your computer can only provide 900 mA at best via USB 3.0 and 500 mA at USB 2.0.

Please charge it through the wall. Thanks
Reply Report as spam Dec 26, 2013 at 8:13 PM
Can you please try charging this E4 with a different charging cable for 20 hours to see if it will charge up through your PC's USB port? If the issue is our unit, we would be happy to make an exchange for you or issue you refund per our 18-month warranty. Please email us at with your order # so we can resolve this for you.
Reply Report as spam Jan 8, 2014 at 9:31 PM
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