I've had my most recent DNA since June 13', and while I've never been thrilled with the batttery life, about 3 weeks ago I started having issues with my battery draining much faster than normal. In one instance I lost 15% of battery from less than 5 minutes of browsing my facebook newsfeed and then lost another 10% for a 15minute call that would usually only use about 2%. Simultaneously I also started having problems charging my phone from my work PC via USB. After 3 hrs I'd only get a 5-6% boost at most. I haven't done anything to the phone besides powering on and off, restarting and a soft reset on the day it started happening. Charging via my original wall charger seemed a tad slower than normal but not to the point of being a nuisance. Oddly, a couple days ago my battery starting giving me my normal usage again and since yesterday I am able to charge via my work PC's usb port with no problems anymore. Any ideas as to what would have caused the problem for nearly 3 weeks that has apparently cleared itself up?