Normally, what happens is, there are something like OS Drivers who keeps Processor in low power state. So, battery is saved.
When phone is in update state, there are no drivers invoked so processor runs on full power (same as when u turn on PC/Laptop, you hear fan sound but it stops after windows starts).
Due to this condition, battery is consumed a lot.
I am particularly interested to know how is battery life affected after GDR3.
Anyone on this? (I know it has not been long since update has come, and people playing with GRD3 will have higher drop in %)