stevekat, all of the things mentioned above are valid and definitely deserve your attention. I also notice you stated you have 4G LTE turned on, but the coverage is pretty spotty. One of the things that uses up your battery is your phone searching for and trying to maintain a signal, when you're texting or checking emails, for instance. You may not have any problem with calls because that doesn't have anything to do with data service. But when you need to use data, and your phone is continually searching for the best data signal, it can use up your battery pretty quickly. If you can, try to wait until you can pick up a strong LTE signal or wifi. If you receive a strong 3G signal, you can go into Settings>More settings>Mobile networks>Network mode and check CDMA only. That will stop your phone from searching for the 4G LTE signal. If you spend a lot of time using the data capabilities of your phone, and these suggestions won't work for you, then you'll need to invest in an extended battery (but not one of the cheapies mentioned above). I use a Gorilla Gadget 4500 mAh battery (about $25) much of the time, especially when I'm going to be away from home most of the day, and I get about 36-46 hours (with pretty heavy data use).