If you can’t imagine life without your electronics, you know how important it is to keep those batteries charged up. Thankfully, external batteries enable us to charge up anytime, even while on the go. Turn to the Anker Astro E4 to keep your gadgets and gizmos powered up, prolonging the life of your electronic devices’ batteries along with the length of time you can go about your life without worrying about finding an outlet.


With two high speed ports to keep you connected while you re-charge, the Anker Astro E4 external battery has 13,000mAh capacity with 5v/2A output and 5v/2A input. Weighing just 10.8 oz. and measuring 4.9 x 3.0 x 0.9in, this device is easy to carry with you anywhere you go. It comes with connective adapters to make sure you can use it with most devices.  


You know only too well the frustration of having the battery on your cell phone waste away before your eyes as you rush to that meeting with no time to plug in, or the frantic search for a free outlet at the coffee shop before your laptop dies and you miss the deadline on an assignment. With the Astro E4 battery backup handy, you won’t need to worry about missing that important phone call or getting lost in the middle of nowhere with no GPS. No need to wait for one device to finish charging before juicing up the next, as this device is a multi-tasker that can power up your phone along with your tablet – and keep you connected to the world while you wait. This device packs in the power – enough to charge up your smartphone three times over, maybe more depending on your phone battery size.


Voted best external battery pack by Lifehacker, this powerful, slim, affordable device was the clear favorite in a reader poll. Reviews posted on the Anker website proclaim the Anker Astro E4 to be one of the best tech-related gadgets around, holding plenty of charge – enough for three or four cycles of charging for a Galaxy s4, says one consumer. The built-in flashlight is a nice bonus, as are the extra cables included in the carrying case.

Tips and More

This device is compatible with USB cables other than those included in the packaging. Astro E4 works with new Apple iPhones (5s and 5c) but you need to use the cables that came with the phone. You can charge two devices simultaneously but need to keep in mind that the total output current won’t exceed 3A. If you have trouble using the Astro E4 to charge your electronic device, check that all connections are secure and that the cables are functioning properly. Also, check to ensure that the E4’s voltage is compatible to your electronic device by referring to the instruction manual, product label or adapter.


The Astro E4 cannot charge Samsung or Asus tablets. Again, it works iPhone 5s and 5c but Apple connector is not included; you need to use the one that came with your phone.

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