[Recursion]

Blinking green light means it's trying to deep sleep. Blinking means something's holding it up, and obviously the OS is waiting for something, which means it's checking every one or more cycles for some logical state. So...not so good compared to deep sleep, which is solid green.

Not sure how to check what's keeping the OS busy, or keeping the logical state from arising. There are some apps that let you see what's occupying the OS, like "Android Assistant." You could try looking at what's hogging the CPU when your blinking green, but not sure how accurate it would be.