Having a similar problem with phone's battery life. I bought my phone in November, a full charge would last me up to two days with moderate/heavy use. Within the last couple of days, maybe a full week now, my phone's battery is down to nothing by 3pm after I just pulled it off of the charger at 100% at 7am. Read many of the previous posts on this thread and others so I could try and fix the problem myself. I've done SEVERAL of the suggestions: cleared cache in the settings and by turning off phone, holding power/home/volume up, etc., taken out SD card, formatted the SD card (which I bought brand new just for this phone) using the phone and not the PC, deleted all .pdf files on phone, charged to over 90%, turned off syncing files to any cloud storage, restarted after everything I tried. That stupid Index Service is still eating my batteries at around 50% usage. I don't understand why it would be my SD card anyhow, as I put it in immediately and didn't have a problem until now. There wasn't any new files added or downloaded recently- plus I deleted everything but the photos on my phone's internal memory. I don't really want to have to do a system reboot- any other suggestions?