A new iPhone add-on devised by California-based company Peri aims to give iPhone users a double whammy: more battery power and sound volume, all for less cash. Called Peri Duo, it comes in the form of ...

The PERI Duo is an iPhone battery case for the frequent entertainer — those who go out with friends and find that they’re the one stuck hooking their phone up to a speaker and doing some impromptu ...

Peri Duo ($189.99 MSRP; $150 on Amazon) combines a protective case for iPhone 6/6s with a pair of stereo speaker grilles molded into the back for pumping up the jams without carrying around a separate ...

If there are two product areas that seemingly don't need any new entries, those are probably portable Bluetooth speakers and iPhone battery cases. But what if you could get both of those product ...