I'm trying to understand the effect signal bars has on battery life. I've moved providers and my old provider gives me 4 bars and -84 to -89 / -15dBm to -6dBm and the new provider 3 bars but it fluctuates between 1 and 3 bars at -97 to 103dBM / 0dBm to 3dBm transmit power. Is that significantly worse power consumption to affect battery life? It seems worse but hard to tell with these things. New carrier has much better 3G coverage and 10x the speeds. I get 3G everywhere but maybe only 1 or 2 bars in places where as old provider falls back to 2g a lot.