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Anker 2nd Gen Astro3 12000mAh External Battery Charger with PowerIQ™ Technology

Anker 2nd Gen Astro3 12000mAh External Battery Charger with PowerIQ™ Technology


Product Description

The all-new 2nd generation Anker® Astro3 recasts the possibilities of mobile power.

Compatibility maximized.

Not all charging ports are created equal. Standard ports only communicate effectively with particular devices, like Apple OR Android, often limiting their recharge rate. But with PowerIQ™ technology, each port intelligently identifies your device to speak its unique charging language. So plug in any brand or model and enjoy compatibility that doesn’t limit your charging speed.

Packed with power.

We figure, the more power, the better. Packed with 12000mAh of juice, and featuring an energy efficiency rate 10% above previous generation Astros and many current standard alternatives, the new Astro3 charges the iPhone six times and large-capacity phones like the Galaxy S4 almost four times.

Double take.

Chic and minimalistic, the new Astro3 may feel reserved at first. But, a friendly “shake” reveals its warm inner light to display the power level or begin your charge. Generous, cool, and delightfully intuitive, the new Astro3 is perfect for your next adventure, or just the daily grind.

For optimal use.

• Please use your device’s original cable or a third-party certified one (such as MFi).
• Compatible with all Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices. The iPod nano, iPod Classic, HP TouchPad, LG G2, Asus tablets and some GPS and Bluetooth devices are not supported.

Customer Reviews

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Customer FAQ

Q1.  Can I use USB cables other 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.

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Latest Post

Over charging
Is it possible to over charge the astro 3??
Replies(1) Collapse Report as spam Aug 18, 2014 at 10:55 PM

In general use this won't be possible. We wouldn't recommend leaving it on charge for days on end though as it can be detrimental to the battery's lifespan.
Reply Report as spam Aug 19, 2014 at 3:30 AM
Surface Pro3
Hi I recently bought a Surface Pro 3 tablet.Will the Anker Astro3 battery charger be compatible with the Surface Pro3 to charge it when needed? Thanks for info.
Replies(1) Collapse Report as spam Aug 12, 2014 at 8:28 AM

Unfortunately the Surface is a fairly power hungry device with its own power adapter.

The max output of the Astro3 is 5V and this won't be enough to provide a charge to the Surface.
Reply Report as spam Aug 12, 2014 at 10:00 PM
Charging rate??
I have read on Apple sites that Iphones charge at 5v1amp, Ipads at 5v2.1amp. Will charging at 5v3amp shorten battery life? According to Aplle it will.Their was another post about this charging issue and I explained it all basic on my educational level with electronics. Their were some people who turned it into and utter and complete joke. 99% had no electronic background but made tons of dumb comments. As the post went on a couple people that were using the iPad charger on their iPhone ruined their iphone battery. Once these people started posting that these people stopped with their stupid replies. the reason volts, watts, and amps are put on chargers are for a reason or else why would they put them on. I can get really technical with formulas on this but I will go with a very simple one. All Apple chargers are 5 volts. Amps is the amount of current flowing into your device to charge your battery. Watts are easily calculated V x A = W Example. Charger is 5 volts and is 1 Amp so it has 5 watts (iPhone charger)              Charger is 5 volts and is 2.1 Amp so it is 10 watts (iPad charger) That one I just rounded up the number like apple did. Most PC's 5 volts and it is .5 amps so it is 2.5 watts Slow. Charging your battery is best to get the most out of it but who would want to plug their new iPad into their PC and wait 24 hours for it to charge??? No one, not even me. Despite it saying "not charging" on the screen plug it in your PC overnight and remember what you started off with, turn off the screen, let it go for 4 hours, and YES it will charge at a VERY slow rate. The screen says not charging, but give it a try and you will see that it did charge up but very little. Has anyone looked up the battery capacity of the new iPad verses the older generations?? iPad 3       11,500 mAh battery 42.5 wattsPad 2          6,944 mAh battery 25 watts So with their 5 volt charger 2.1 Amp 10 Watts you are fine because you are not going over the battery specs .Pretty amazing how they achieved that many mAh just by making it slightly thicker. Very technical how it was done but not for this discussion but it is almost double capacity. Now let's talk iPhone. IPhone 4S     1,420 mAh battery (1.42 Amps)                      5 Volts x 1.42 Amps = 7.1 watts iPad charger is 5 Volts 2.1 Amps 10 watts. Now you see the problem? Will it work Yes, but you are over charging (forcing to much current) your battery. End result you are decreasing the life of your battery. Apple says you can use any charger and you can see above a simple formula in simple math. So why would you use a charger that is 2.1 Amps 10 Watts on a battery that is 1.42 Amps = 7.1 watts Does anyone know what the cost is for Apple to put a new battery in your phone? I am curious on that one and would guess its not cheap. Their is a formula in simple math. Can you use the ipad charger on your iPhone ? Yes. Will it shorten your battery life using the iPad charger on your iPhone? Yes. This is the simplest formula broken down into simple math.
Replies(3) Collapse Report as spam Aug 8, 2014 at 5:04 PM

Power IQ means that our batteries and chargers will never overcharge your devices. They'll charge any device at the device's native charge level.
Reply Report as spam Aug 11, 2014 at 12:30 AM
You don't have to worry about any of that with this charger because it has Anker's PowerIQ Technology. This means that your device will be charging at the fastest speeds and the most efficient way. This is because there are smart chips in each USB port which figures out what device is plugged in and charges it the best way. 
Reply Report as spam Aug 8, 2014 at 7:00 PM
I duno bout PowerIQ, it never made sense to me since I've read that the lithium ion polymer batteries already limits the amount of current our phones receive...I believe it's a programmed chip.My iPhone 5 charges 1% per minute at 1A and I plug it into 2.1A and it still charges at 1% per minute...IMO it is limited?Of course you can always "fry" a device if you force power over the battery's expectation...I mean come on, they won't try to protect it from a lightning bolt.... 
Reply Report as spam Aug 9, 2014 at 7:28 AM
Standby charge
How long does the Anker® 2nd Gen Astro3 12000mAh hold a charge after it's fully charged and placed on standby?
Replies(1) Collapse Report as spam Aug 7, 2014 at 8:35 PM

If you're not using it at all then it'll keep it's charge for literally years.

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 2 months.
2. Do not over-charge or over-discharge it. It is best to keep it charged between 5%-95%.
Reply Report as spam Aug 8, 2014 at 2:30 AM
Using on Motorcylce
I'm looking to use this to recharge phones and gopro on a multi-day motorcycle trip. Motorcylces tend to vibrate and be bumpy though. Am I going to be constantly providing that "friendly shake" and drain the battery by having the status light on non-stop? Can I disable the shake feature?
Replies(1) Collapse Report as spam Aug 5, 2014 at 11:36 AM

The shake feature can't be disabled and you probably will be activating it quite a lot.

Don't be concerned though, it'd take over 100,000 shakes for the battery to lose even 1% so you won't notice a difference.
Reply Report as spam Aug 6, 2014 at 2:00 AM
Quite a punch for so small!
Been using my 2nd Gen Astro 3 for about a week and a half now, and I must say that it has exceeded expectations! My only gripe was that it does not come with a charger, so I opted to by the 40W desktop charger so that I could charge my phone, fiancee's phone, and my Astro3 all at home at the same time. Convenience at a reasonable price, nothing bad about that! For those who complain that it needs pass-through charging, you need a better understanding of how electronic devices and batteries work. Pass-through charging is bad, and I do mean absolutely terrible, for batteries. You want a shorter life-span? Add pass-through charging.
Replies(1) Collapse Report as spam Aug 1, 2014 at 1:22 PM

Thanks so much for your kinds words and yes, you're totally right about pass through charging!
Reply Report as spam Aug 3, 2014 at 11:00 PM
External coating
Hi,   I'm completely satisfied with your charger. It is really powerful and it charges at 2A as it is declared in the specification and it has really a great  amount of charge 12000 mAh wich let you charge your powerful smartphone  3-4 times.I'm a little non that satisfied with external package. After only 1 week the external rubbery coating started to detach from the plastic case showing up the black plastic package. And started from there it continued to loose the rubbery coating in the next days.Is it normal or are you thinking to a more robust coating for it?
Replies(2) Collapse Report as spam Aug 1, 2014 at 7:44 AM
I haven't noticed an issue with the coating, do you pocket the device without it's carrying pouch a lot?
Reply Report as spam Aug 1, 2014 at 1:48 PM

This sounds like an isolated incident, the coating is usually fairly robust and shouldn't start coming away by itself.

Can you get in touch with our customer service guys with some photos of the problem and they'll get you a replacement sorted? Email them at
Reply Report as spam Aug 3, 2014 at 9:00 PM
Compatible with Motorola Moto G, Android?  Thanks!  Looks excellent.
Replies(1) Collapse Report as spam Jul 21, 2014 at 5:36 PM

Yep, definitely compatible!
Reply Report as spam Jul 22, 2014 at 2:00 AM
Fantastic Charger... But...
I really do love this charger. Most efficiant charger I've owned (and I've owned several). I only have a couple of issues with it that I feel would make this the most solid charger on the market, hands down.1. on one end of the charger there should be a two pronged AC plug so I don't need to find a micro usb cord in order to plug it in. It could just plug into the wall.2. built in cables. The battery should come with both a silicon microusb and flash attachment that folds into the battery in addition to the three usb ports on the side. Some times I need to charge multiple devices, but most of the time I'm charging my phone. If i could attach an attachment that has micro usb charging cord that folds into the device, it would mean I didn't have to carry around multiple cords. 3. Charging passthrough to allow me to use the battery with myphone while the battery is plugged into a power source.
Replies(1) Collapse Report as spam Jul 15, 2014 at 3:53 PM

Thanks so much for the feedback.

These issues are all hotly debated by our customers when discussing what kind of changes they'd prefer with our batteries and if there's one thing we've learned it's very tricky to satisfy everyone! Apologies that you haven't found our design choices to your liking on this occasion but we do listen to all customer feedback and hopefully we'll get something on the shelves soon that is more to your taste!
Reply Report as spam Jul 16, 2014 at 1:30 AM
charging cable
Hi Anker, I understand that a 28/24awg USB cable has a quicker charging ability then a 28awg cable. Is this true? If so, is the cable that came with my 2nd gen Astro3 12000mAh a 28/24awg cable?
Replies(4) Collapse Report as spam Jul 14, 2014 at 8:28 PM
Fire and Ice
Lower gauge is better but honestly doesn't matter that much as long as you get a quality cable and not a cheap one from the dollar store
Reply Report as spam Jul 14, 2014 at 10:54 PM
Ron cycle touring
oops!! The reason for the question is that I will be using a Anker® 14W Dual-Port Portable Foldable Outdoor Solar Charger. This will be riding on the rear of my bike most of the time and probably won't always be getting optimum sun exposure.
Reply Report as spam Jul 14, 2014 at 8:40 PM

In fact our supplied USB cables are 28/22!

This means they're even better than 28/24.
Reply Report as spam Jul 15, 2014 at 10:00 PM
Ron cycle touring
Quote From ANKER Team:thank you, glad to hear it.
Reply Report as spam Jul 16, 2014 at 11:03 PM
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