Today we’ll take a look at a great battery by Anker.  It’s lightweight, packed with power and can output up to 4A.  With 12,000 mAh you can charge an iPhone 5S about 6 or 7 times (5S rated at 1560 mAh).  It’s not small enough to carry around in my pocket (plus it weighs about 10.5 oz) but it is very easy to place in a backpack or larger purse.  Even with pretty heavy use, this battery can keep your phone going all day long.

Here are the main features from the marketing materials

·         High capacity 12,000mAh battery charges up to three mobile devices simultaneously, making sure your devices are powered up and keeping you connected

·         First external battery to feature a single port that offers full-speed, fast charges to both iPad and Samsung Galaxy Tab

·         Offers highest-in-the-industry 4A current capacity

·         Two additional ports support universal charging for Android phones at maximum speed; also compatible with iPhones and other 5V charging devices

·         “Shake” lightweight device to activate or see battery’s remaining power level on circular LED power indicators

·         Capable of six to seven full charges for most smartphones, delivering more than 50 hours of talk time

·         Energy efficiency rate 10 percent higher than other external batteries


The packaging is simple.  Not too much plastic  and not a lot of excess.  I like this for what it saves on storage and for what won’t be headed to a landfill.

Cool LED

Look and feel

The design of the battery is simple and clean.  It’s approximately 4 1/4” x 3 5/16 x 15/16” and black.  The finish is smooth but not glossy except for on the ends.  The smooth finish feels good to the touch.  To judge the amount of power remaining the device has a circular LED display.  The LED readout is cool because until it’s “on” you can’t really even see it.  When it is shining, it has a nice subdued glow and it’s easy to read.  At a little over 10 oz, the device feels solid too.  All the charging ports (in and out) are on one side and are easily accessed.


I’ve enjoyed experimenting with this battery.  One of my huge peeves with the mobile phone and mobile device market is short battery life and while I would rather carry fewer devices, this is one I would gladly haul around.  It can easily replace a few other backup batters of lesser capacity.  The charges for iPad and phones are fast and according to the materials, the device is smart.  It’ll output what you need.  The only downside, if you can call it that, is the charging time for the device itself.  With huge capacity comes huge charging time.  This is one you have to let go overnight for use the next day since it’ll take hours to charge.

Additional software


Anker Astro3 ports
3 ports of power


The market is crowded and the costs are dropping quickly.  Something like this used to go for hundreds. This one is now on Amazon for 49.99 and was originally listed at 149.99.  The price per mAh is pretty good ($.0042/mAh vs the Ontrion device I reviewed at $.0071/mAh) and given that it can output up to 4A (you can quickly charge up to 3 devices), I think’s a great bargain.


This is a great choice for anyone looking for options when it comes to back up batteries.  High power output and good looks make it an attractive option.

Buy it from their website here or feel free to use this affiliate link – Anker® 2nd Gen Astro3

Lance Gilliland

Consumer Electronics. Technology. Media. Comics. Football. Family. Health. Entertainment. Great, now my fingers are tired.

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Lance Gilliland

Consumer Electronics. Technology. Media. Comics. Football. Family. Health. Entertainment. Great, now my fingers are tired.

Follow me on Twitter | Facebook

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