The Peri Duo is an iPhone case that includes battery-charging capability and wireless speakers, and was created by California-based company Peri. This case integrates a 2,500 mAh battery and a speaker system that is pretty darn loud.
The battery offers between 12 and 17 hours of talk time and four to six hours of music playback.
The developers of the Peri Duo are currently operating an Indiegogo crowdfunding campaign to bring the product to production. A pledge of $79 will get you set up with a limited edition of the Rhymesayers case if and when it becomes a reality. $99 gets you a Peri Duo for the iPhone 6 Plus, which represents a 33% saving on the expected retail price of $149. This works out to be cheaper than buying a separate battery case and wireless speakers.