The Anker Astro E4 is a high capacity portable charger for any USB device. That is a device that utilizes a charger with at least one end being a USB. The product is 5.9 in by 2.5 in by .9 and weighs around 10.5 oz according to the specs provided by the Anker website (http://www.ianker.com/product/79AN13K2-BA#ptop). Its capacity is 13000 mAh which is enough to charge my Samsung Galaxy S4 around 4 times. This has come in handy, because on my travels its a struggle sometimes to find an open charger, but ever since i bought this power bank i struggle no more. The best part about this product is the IQ technology which recognizes the device that is plugged into the power bank, and provides that device with the optimal charge. I originally thought this wasn’t going to improve the speed of charging my device, but after a few uses I realizes just how quick my phone and other devices charge on this power bank. The Astro E4 takes between 6-8 hours to charge if you bought the 2A adapter for an additional fee. I tried to avoid buying the adapter, however the device takes an incredibly long charge, so i caved and bought one. With that in mind, I would absolutely recommend this product to anyone looking to buy an external charger. If you do not find yourself struggling to find outlets on your travels, then I would not waste any money on a power bank.
– Tyler Hubbell