Is your phone always running out of juice — even with those extra battery cases? Prong is here to help.

Prong co-founder Jesse Pliner was on the floor at the CES Unveiled preview event Sunday night showing folk his ingenious idea for making sure we’re only an outlet away from rejuvenating our phones. The PocketPlug case has a plug built into the back, meaning you don’t have to carry an extra cord or charger in order to get some quick juice.

The $69.99 accessory works with the iPhone 5/5s and iPhone 4/4S, and also has a micro-USB port so you can still charge your phone with a cord if you want. The case is also designed to pump music and other audio out of its front.

There are, however, some downsides to the design — namely that you can’t use your phone for much  while it’s plugged into the wall. The device is made to quick-charge so you’re not separated for long, but apart from rocking out to some music from the wall, you aren’t able to do a whole lot while charging.

Pliner said that the company is listening to suggestions for other models, including one that will have a battery case in addition to the plug. But, for now, Prong is plugging along with its current models and trying to get the word out about their “why didn’t I think of that” product.

Up close and personal with Prong (Hayley Tsukayama)