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Anker Astro Mini 3000mAh External Battery

Anker Astro Mini 3000mAh External Battery

Charger- 40W 5-port desktop charger

Product Description

Low-profile? Check. Convenient? You know it. Reliable? Of course. With the Anker® Astro Mini, gain access to stylish, portable power - all in the palm of your hand.

A shot to your phone.

When all you need is a boost, the Anker® Astro Mini's got you covered. Holds enough juice to get you back up and running without weighing you down (less than 3oz). Add more than a full charge - that's up to 9 hours of talk time to an iPhone or more than 90 hours of audio playback to most other phones.

Undercover power.

The external battery of choice for secret agents, overnight campers, busy parents and those headed out for a night on the town. At the approximate size of a tube of lipstick, it slips easily into your bag, pocket or even your clutch (only 3.5in long). Eliminate the bulk, but still be ready with a backup.

Primo construction.

As with all Anker® products, each Astro Mini is built with dependability in mind. Specifically, we incorporate premium microchips, Samsung Grade A cells and a rugged aluminum outer shell to ensure the highest quality possible to our customers. Whether you're in the car, at a party or somewhere out on the trail, know you've got a reliable battery that won't let you down.

For optimal use.

• Compatible with all Apple and Android smartphones, tablets and other 5V input USB-charged devices. The iPod nano, Samsung and Asus tablets and some GPS and Bluetooth devices are not supported.
• To start a charge, first press the power button.

Customer Reviews

Clint Potts Of course, thats just my opinio..
  • Pocket Magic: I could use one of THOSE!
  • I've started to do more weekend camping with my son and his fellow Boy Scouts, so I find myself away from convenient charging more frequently. Some of our trips have little coverage, so my phone torques up its receiver to try to find a signal, draining my battery more rapidly than usual. On these occasions, I usually have to kill my phone and light it up only when I need to make a call. This isn't necessarily a bad thing, as after all, we are camping. However, it is still important to have that charge when you need it. When we are lucky enough to be near my Jeep, I will charge overnight using a car charger. When away from this convenience, I've been out of luck and have to nurse the battery over the weekend. A friend received one of the Anker chargers as a door prize when attending a recent convention and was showing it off in-camp. I had a Buzz Lightyear moment: "I could use one of THOSE!" I found one here on Amazon and bought it. I had my first chance to use it a week later. As we were camping near civilization, I had a strong signal and battery use was normal, but I used the Anker charger to top things off before going to bed. The phone charged quickly and fully and I'm assuming it still had more juice left-over, as my device charged in less than 30 minutes. I will be taking this little guy with me on every trip now. It is small enough and light enough to meet backpacking needs for minimal weight. My phone is a lot heavier, and if I have to carry it, I'd rather it work than carry an expensive brick. The small weight of the Anker charger is well-worth the added pack-weight if it keeps my phone working until we get back to civilization. There is every indication that this is going to be a life-saver one day.
  • 2014-04-15

  • A very nice charger
  • This was purchased for an upcoming overseas trip for a family member, and we've been having fun putting it through its paces before she leaves. I knew she was going to need a charger for the long plane ride, but was unsure about which one to get, since anything within my budget had a LOT of negative reviews. I heard about Anker from somewhere, and looked the products up on Amazon, was impressed with the reviews and reports of excellent customer service, so I took the plunge. Devices we own that this charger will charge: iPod Classic 160, iPod Touch 4th gen., Kindle Paperwhite, Kindle Keyboard, Samsung phone. (We didn't try to charge my husband's cell phone because it is so old it requires a flint and steel.) The Anker charger was able to give each of these devices a full charge, and the connections seemed secure; no cords fell out when things were picked up and moved. In fact, I walked around my house with the iPod classic plugged in; the charger in one pocket, the iPod in another, with the cord strung between. I like the compact size, and think it will be very good for travel; plane travel especially, and the price is low enough that I won't be horrendously upset if my daughter loses or breaks it on her trip. Also, the 17 year old has stated that he would like an entire bandolier of these, so he never has to run out of power again. I THINK he was kidding.....
  • 2014-04-15

Travanis Carter
  • Broke the first day.
  • The first day I received it, I used it once, then I piece broke off in the usb slot. I called customer service and they refunded my money. The only reason I bought another one is because when I did use it the one time, it was really neat and worked well. I don't know if it was just that one that was defective, but I ordered a new one and will see what happens.
  • 2014-04-14

  • Small & Speedy
  • This does a great job of charging my phone. It charges pretty quickly (15 mins to 50% of battery) and is small making it super easy to carry
  • 2014-04-14

  • Very good product
  • This is the second Anker portable charger that I bought. This charger help me so much during my last vacation in FL. I was most of the time on the road and when I was out of battery, I used it. I forgot my car charger so this was perfect to use.
  • 2014-04-14
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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 you need to press the power button to begin charging other devices?
Q11.  How long does it take to fully charge this Anker external battery?
3-4 hours with a 1A output charger.
Q12.  What do the LEDs indicate when the external battery is charging itself or other devices?
The green LED indicator will flash when the Astro Mini is charging other devices. When it is recharging itself, a constant green LED indicator will light up and will turn off automatically once the Astro Mini is fully charged.
Q13.  Why can’t I charge my Bluetooth device with the Astro Mini?
The Astro Mini will not charge devices with input currents lower than 30mA, including some Bluetooth and GPS devices.
Q14.  What if the Astro Mini 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.
Q15.  What if the Astro Mini fails to charge my devices?
Refer to the tips listed under Question 6, and check that the Astro mini’s voltage is compatible with your electronic device's required charging voltage. Please make sure to press the power button. Please email us at duiring your 18-month warranty period if the provided acessories or the external battery have problems.

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Latest Post

Anker external battery fully charged ?

I just bought the Anker external battery and I dont know when the battery is fully charged. can you please outline the steps in charging the Anker external battery fully? how do i know the Anker external battery is fully charged 

Replies(3) Collapse Report as spam Apr 16, 2014 at 2:44 PM

The light goes green when it's fully charged. Red when it is charging.

Reply Report as spam Apr 16, 2014 at 6:09 PM
Fire and Ice

Exactly what gheraradi said! 


IT should have also been listed in the manual

Reply Report as spam Apr 16, 2014 at 7:08 PM

Nobody reads the manuals....

Reply Report as spam Apr 16, 2014 at 8:10 PM
Battery won't charge my phone

So I recently bought this the other day through amazon and received it yesterday and I noticed that when I turn on the anker battery it will stay on and charge my phone for about a minute and then it turns off and stops charging my phone and I charged the anker battery over night through a wall outlet. I dont know if im not turning it on right or if there is a trick to it. Someone help!

Replies(3) Collapse Report as spam Apr 13, 2014 at 10:47 PM

Hi worth checking a few things;

1. Is the wall charger rated to 1.5A and did it fully charge the battery- is the battery charged up?

2. What mobile device are you charging - Anker batteries will sometimes not charge devices with too low a draw ( less than 30mA) like Bluetooth or GPS devices

3. If it is faulty then contact as their support is out of thesis world

Reply Report as spam Apr 13, 2014 at 11:52 PM

1. The wall charger is 2.0V and as far as I know it is fully charged because when I click the button to check it lights up green

2. I am using it to charge a Galaxy S4

so essentially I have no idea what is wrong

Reply Report as spam Apr 14, 2014 at 10:38 AM
It does sound like your Mini may be playing up.Get in touch with your customer service team at and they'll take you through some troubleshooting and will be happy to offer a refund or replacement if it does turn out to be faulty.
Reply Report as spam Apr 18, 2014 at 3:00 AM
did not charge my phone

I have a samsung S4 phone and I recently purchased this battery. I charged it and attempted to charge my phone. My phone was at 33% and was charged up to 64% when the anker stopped charging I'm assuming because it had not more power. I minimally used my phone while charging to answer text messages. It was connected to my phone for about 3 hours before it stopped charging. Is that all the charge I am able to get?

Replies(3) Collapse Report as spam Apr 11, 2014 at 12:15 AM

if both batteries are of equal size, 1 is at 100% and the other is at 0% then the charge should be 50%. I'm not exactly sure how the Anker charger works but it doesn't seem possible to charge the battery more once the 2 of them are equal.

Reply Report as spam Apr 11, 2014 at 1:09 PM

This battery should give 80% efficiency which is about 15% better then competitors, so of the 3000mAh about 2400mAh should convert.

so Samsung Galaxy S4 batteries are usually big the standard being 2600mAh so it'll never get 100% full. even worse if you have a higher capacity battery.

i would suggest however your issue here is the use while charging - if you have an app to monitor battery use you'll see it's not what your doing that discharges the battery, 90% of the time it's just the fact the screen is on, these absolutely drink power!  Better test your optimum recharge % without touching the phone, in fact turn it off at as near to 0% battery and then when the Anker is finished, switch back on to see how much you then have, hopefully about 85% if my calculations are correct.

Reply Report as spam Apr 14, 2014 at 12:15 AM
Sorry to hear you're having problems with your Mini!It sounds like it may be acting up so if you get in touch with our customer service guys at then they'll be able to help you troubleshoot and then provide a refund or replacement if you're still having trouble.
Reply Report as spam Apr 18, 2014 at 2:30 AM
Agreed again

Again agreed.  To me it shows that a lot of thought goes into presentation and storage of Anker products, and how they ship.

Replies(1) Collapse Report as spam Apr 8, 2014 at 6:34 AM

Yep, I save the boxes figuring that I'll use them when I need a little gift box.

Reply Report as spam Apr 8, 2014 at 4:50 PM

Agreed. I love their external packaging.  It's solid, shows care is taken, and easy to open.  And it's not only recyclable, it's reusable.

Replies(2) Collapse Report as spam Apr 8, 2014 at 6:31 AM

Ya, I haven't throw mine out yet [after 3 months] b/c I know I have a use for such a great box to give someone something later....

Reply Report as spam Apr 8, 2014 at 10:15 AM
Tech X-Ray

I keep the box for reuse but I throw out the sleeve.


I love Anker packaging 

Reply Report as spam Apr 8, 2014 at 2:21 PM
It's the little things like a mesh bag

It may seem like a small thing, but the little mesh pouch that comes with this charger is very nicely constructed. It holds the charger and the cord, and it's these kinds of little additions that show a considerable amount of care goes into Anker products.

Replies(2) Collapse Report as spam Apr 7, 2014 at 8:46 PM

Yes it does. They pay good attention to detail. How'd you like the boxing of the battery. Simple. You didn't have to rip it apart to get it out.

Reply Report as spam Apr 7, 2014 at 11:42 PM
Tech X-Ray

I like the boxing the most.

How well they save space is amazing.

Reply Report as spam Apr 8, 2014 at 12:34 AM
Anker Mini takes a long time to charge?

I have a 1.8A output wall charger that charges my phone battery really quick but the Anker Mini takes about 5 hours to charge up. Is that normal?

Replies(3) Collapse Report as spam Apr 3, 2014 at 4:18 PM
Tech X-Ray

No that's not normal. Check the cable. try a different cable. Make sure you're plugging it into the input and not the output

Reply Report as spam Apr 3, 2014 at 4:55 PM

The input and output are two different sizes. Impossible to do.

I seem to recall my Mini taking a bit longer than I expected to charge given its size, but can't remember exactly how long. But a 1.8A charger ought to do it quickly. I agree, try a different cable if you have one.

Reply Report as spam Apr 3, 2014 at 6:07 PM
Shaan Sunder

Ya i'd try a different cable. Might be faulty. Should charge faster than 5 hours

Reply Report as spam Apr 4, 2014 at 3:30 PM
New device question

I just got my new Anker Astro Mini.  Does it require a charge before you use it in order to maximize the battery life? 

Replies(2) Collapse Report as spam Mar 27, 2014 at 8:10 PM

You can if you want but it's not necessary.

Reply Report as spam Mar 27, 2014 at 8:24 PM

It is highly recommended to charge any device before its first use, per most manuf's instructions.  I've had my Mini for quite a while now and have noticed no loss in its capacity when charged as stated.

Reply Report as spam Mar 29, 2014 at 1:26 AM
Anker Astro Mini External Battery


I bought the Anker® Astro Mini 3000mAh Ultra-Compact Portable Charger from Amazon on 07/02/2014. I tested it when I first received it and it worked fine. I went to use it yesterday and it didn't charge at all. I plugged the battery into my laptop to charge (for around 4 hours). I connected it to my iPhone 5S, pressed the power button. The green light came on for 5 seconds and then switched off again and will not charge my phone.

Amazon order number: 205-5351591-4077154


Daniel Ramsell

Replies(2) Collapse Report as spam Mar 21, 2014 at 4:54 AM
David Hocutt

It may just be a bad battery...but did you try recharging from a wall outlet?  I'm not sure it will charge from a laptop USB connection.  It may not draw enough power. If it is a bad battery Anker has an excellent warranty program. This is an excellent product; I've had mine for almost a year and use it frequently for my Samsung phone and iPod. Good luck!

Reply Report as spam Mar 21, 2014 at 7:05 AM

Ditto. I have two, they perform flawlessly, but I do charge them from a wall outlet. Give that a try. If not, Anker does a heck of a job standing behind their product. Good luck.

Reply Report as spam Mar 21, 2014 at 8:25 AM
Works great.

Just came in the mail a couple of hours ago and tried it out. Works really well on all of my devices. I may have to buy another one.

Replies(5) Collapse Report as spam Mar 16, 2014 at 6:37 PM
Compact and powerful, great isn't? I like how ultra-portable this model is.
Reply Report as spam Mar 16, 2014 at 6:51 PM
I already have two. Looking for the right excuse for the third.
Reply Report as spam Mar 16, 2014 at 7:29 PM
IT Owl
Haha yeah lots of power in a small package.
Reply Report as spam Mar 16, 2014 at 8:14 PM
There are numerous charging devices that are as large or larger than a smart phone. I like the Mini because it's not much larger than a Chap Stick and holds enough oomph to do what devices like this do best ... give a need boost in an emergency. Don't leave home without it.
Reply Report as spam Mar 17, 2014 at 12:50 AM
David Hocutt
This was the first Anker product I ever purchased. It set the stage for many more terrific Anker purchases, from batteries to keyboards to hard drive enclosures. Keep it up Anker!
Reply Report as spam Mar 17, 2014 at 8:41 AM
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