Although I'm doubtful that this invention would actually save 34.7mW, I was curious to see how much extra battery life this would actually give me.
My Nokia 2630 has a 700mAh 3.7V battery and is rated for 6 hours of talk time. Based on these numbers, the phone consumes 431.7mW. With the power reduction described, this would result in 397mW of power consumption, yielding 6.52 hours of talk time. Thus, an 8.7% increase in battery life.
As I said, I am pretty skeptical of a 34.7mW power savings; research papers often leave out the negative details.