If there is high quality charger which can protect your battery, that will be great! The Rechargeable External Battery Charger for iPhone 4 will give you the freedom to use your iPhone 4 without the daily worry of running out of battery life! Enjoy your iPhone 4 for voice, music, video, face-time, games and business applications with extended, stable, and rechargeable power. You can now experience up to two days or more of uninterrupted iPhone power, depending on usage. With the Rechargeable Battery Charger for iPhone 4, you can have portable power, anywhere, anytime you need it.This Rechargeable External Battery is perfect for your business trip and your home using.
Other Thoughts:Battery is as expected. Maybe it's poor construction of the phone that requires me to charge every other day, or maybe it's just my having used a pay as you go phone with my own sacred that last for days without charging. Great Rechargeable External Battery, I guess.