SaFPWR iPhone 4 / 4S Milano Rechargeable Smart Battery Case - Smooth Black
Extend the battery life of your Apple iPhone 4 or 4S with the SaFPWR iPhone 4 / 4S Milano Rechargeable Smart Battery Case. Every time you charge your iPhone, you permanently lose thirty seconds to one minute of battery capacity. The SaFPWR Milano Smart Battery Case combats this with advanced EMT technology, ensuring your battery cells are fully and safely charged and discharged for extended run times of more than 200%. The more you use your iPhone 4 or 4S in the Smart Case, the more you extend its battery life.