If you're looking for insurance for your iPhone, check out the site above to compare insurance options for your device. With the cost of batteries running in the 3 digit range, having insurance on your phone can be a lifesaver should you ever need to use it.
When shopping insurance, it's also important to get the details on what is or isn't covered. Probably two of the more important details are whether or not water damage is covered (and to what extent – is it only light damage or if the phone is fully submerged?), and what about physical damage through droppage?