For a limited time Amazon is offering up a free Amazon Basics 5600 mAh battery pack, valued at $20, just for signing up for a 30 day trial of Amazon Prime. The free deal is of course in addition to all the great perks you get from having Amazon Prime, like free streaming of all of the movies and videos available to Prime users and of course free two day shipping as well as any other Prime perks.
Amazon’s promotion page (link via Android Authority) and begin the free trial. Within 72 hours, you’ll get a special email code and the directions needed to get your new battery for free. After that, you can cancel Prime at any time and it won’t affect your eligibility for the free battery, though Amazon is banking on the idea that most of trial users will end up letting their subscription renew at $99 (for an entire year’s service) after the 30-day trial ends.
Again this offer is for a limited time and Amazon has not offered details of how long that will last. So you may want to act fast.
As for the battery pack it may not sound like anything special but the reviews on the units are fairly fvorable. It is one of Amazon's specially branded items dubbed AmazonBasics. It features a 5600 mAh Portable Power Bank capable of charging smartphones, tablets and other portable devices on-the-go through a USB port. Amazon says you can use the power bank to charge popular devices like an iPhone 5 (2.6
times), Nexus (2.2 times), Galaxy S5 (1.4 times), or the Galaxy Note III