NEW! All in one integrated power pack for iPhone4/4s. Case holds iPhone, extended life 2500mah battery, and electronics to extend operating time an additional 1.5X. Includes electronics, replaceable battery and external rapid charger. iPhone 4/4s slips into top of case, and the charger and battery are hidden behind phone. Solar module option re-charges anywhere in full sun. Easy to carry solution for extending iPhone 4/4s battery life