The TYLT ENERGI Sliding Power Case for iPhone 5S / 5 is a sleek, protective case with a built-in battery, which doubles your standard battery life. ENERGI is superior in design, material, quality, and construction.
The ENERGI Case with slide on battery is made for the real world. And with slim battery technology, we only add 9mm to the thickness and 10mm to the length of the iPhone so you barely know you are carrying 9 additional hours of talk time. While the case is on, you can easily charge, sync, and transfer data no matter where you're located. LED lights on the case indicate remaining battery capacity. We include 2 slim-line cases; 1 black, 1 colored, so you can change your style on-the-fly.
Charge, sync, transfer data, and listen to music with power sleeve on
Use protective accent case with or without power sleeve
Rechargeable 2,350mAh internal battery
Provides up to 9 hours additional talk time
2 Slim-line interchangeable accent cases
LED lights indicate remaining battery capacity
Does not interfere with your phone's NFC functionality