- Innovative Detachable design: Double the battery life for iPhone 4 4s without adding bulk.
- 1700mAh Swappable Battery Module, which enables unlimited power with additional battery cells (sold separately)
- Exera adds additional 7 hours of talk time, 10 hours of music time, 6 hours of web browsing, and 270 hours standby.
- Smart charging switch. Accurate remaining power indicator.
- 30 Day Warranty
- Brand New