Interesting. Doesn't Microsoft included Skype with their Surface tablets? I wonder if it is affecting those machines as well, or if they are doing something different with them.
Test 2. Phone charged at 8AM. KitKat + other apps (Facebook, Instagram, Twitter, Evernote, 4SQ) + normal usage = Next day at 8AM, phone at ~ 50%.
Sure, Skype is not causing the issue (it is limited to Android tho).