Long story short, I bought a cheap USB extension cable for my iphone so I can have extra slack when using the phone in bed, etc. When I first started using the 5S it had great battery life, nearly 7+ hours of usage which is amazing for the options I had left on. For whatever reason the first few days of having the phone I did not plug in my USB extension cable. Just a couple of days ago I went back to using the USB extension cable, my usage is down to about 6 hours (no change in settings, apps or anything like that) I am finding the battery to drain faster when using apps, or safari etc. I know 6 hours of usage is still pretty good, but I am just wondering if it has to do with the extension cable, or is it all in my head?