I noticed in my battery read out that the blue line at bottom of graph rarely if at all is not constant, I read in another forum that when the phone is sleeping there should be no blue line below the graph. The issue seems to have been determined to be related to the SD card, especially 64 gig class ten types. Don't know if that information is correct but I am researching it.
Asus Transformer Prime/LG G3/Samsung Note 3
Stock Radio latest version
Latest Samsung Update
SanDisc SD 32G Class10