MI SUNY has a case with power to spare. While providing protection for your iPhone or iPad, it also has an external battery. If that wasn't enough the back of the cases are covered with photoelectric cells which can be use to recharge the battery and hence your iDevice. While the case does add some size and weight to the iPhone, it is not excessive or bothersome. With all this extra power, you'll be able to add significant time to use your device. For more information, go to www.misuny.com.