Anker has introduced the 2nd Generation Astro external battery, now available at Amazon.com for US$34.99. iPhone compatible, it's designed to keep any smartphone powered up at maximum speed.

Featuring Anker’s signature Smart Port, the travel-friendly Astro identifies the connected device’s exact charging requirements to deliver the fastest possible charge, according to Steven Yang, Anker founder and chairman. With up to 2A charge current, the 2nd Generation Astro delivers maximum charge speeds to any smartphone, including the power hungry Galaxy S4. The Astro is also compatible to deliver rapid charges to tablets including iPads, the Nexus 7, and the Samsung Galaxy tablet series.

It packs a 6000mAh capacity. Connect your device to the backup battery using the included USB cord and give Astro a shake to activate charging. Anker’s cascading LED lights show exactly how much juice the Astro has left before it needs to be recharged. The external battery features a soft matte black design for optimal grip. 

Yang says the 2nd Generation Astro is able to power up your smartphone three to four times. It measures 3.7 x 1.8 x 1 inches and weighs 9.6 ounces so is easy to transport. Go to www.ianker.com for more info.