The Anker Astro E4 is my third Anker Product and I must say, I am really love this up and coming brand. It seems very popular in the US. The Anker Astro E4 tops the Gizmodo’s Five Best External Battery Packs.
The Anker Astro E4 uses a lithium-ion battery, weighs 308g and measures 126 × 77 × 24mm. It is the first portable battery pack that I have that came with a built-in LED Flashlight. The flashlight is able to last up to 600 hours on a full charge. To switched on the flashlight, just press the power button twice.
It has 2 USB output ports for charging your devices, one USB port is able to output a maximum of 1A and the other USB port is able to output a maximum of 2A.
The Anker Astro E4 requires at least 1.5A to be charged though its micro USB input port and it’s charging rate is at 1,500mAh per hour.
The package includes a carrying pouch and a USB cable with different charging adapters (which I will probably never use since I got my own cable).