I was visiting Jake Tapper and his fantastic crew at CNN's program "The Lead." Thanks to these cats for making me feel at home. Good people. I felt so comfortable in the CNN Newsroom that houses The Lead that I was cool with shouting out to the group -- Does anybody have an iPhone 5 charger I can borrow!? Nobody had one, however, two folks (TheLead producers Jason Seher and Rick Saleeby) both offered up this seemingly foreign object -- an iPhone 5 case that doubles as a charger/extra battery. Mophie!. I was shocked I had never heard of this thing. Never even saw it brought up in association with the iPhone 5 battery gripes I come across. But the damn thing worked so well -- and impressed me so much -- that I went to the Apple Store on Fifth Avenue in New York City to buy my own first thing Friday morning. Mophie is a simple device. You attach it to your iPhone (again, it doubles as a sturdy, granted not-so-light case) and plug it into the wall. At a full charge, the $99 Mophie attachment is merely a battery that effectively doubles the life of your iPhone. Once the Mophie's juice is gone, your iPhone starts using its own battery. I will never take this thing off of my phone. Ever. Even under heavy use, my iPhone 5 lasts all day now. 12 to 16 hours easy. Sure, it brings the cost of a subsidized iPhone 5 up to $300, but who cares? Well worth the expenditure if you use your smartphone as much as I do or worry about being left without it for a period of time. Follow @rocco_thestreet -- Written by Rocco Pendola in Santa Monica, Calif.