Ok so I've had my iPhone 5 since release and I'm pretty disappointed with the battery. Know that I have LTE turned off, iCloud sync off, location services off, WiFi off, etc. After a full charge I go from about 100% to 90-85% in about 45 min. During this time I may check FB once and send 1 text message. I'm thinking I have a bad battery. Should I return it to the VZW store where I bought it or bring it to the Apple store where they can change the battery or issue a new one?