If you are in a fringe signal area, your battery life will definitely suffer as the radio will continually transmit trying to lock onto a signal. If your signal has always been that bad, but just that for some reason, your battery life seems to have plummeted lately, you can try a battery pull. I had the same problem with mine. Didn't have an issue with signal, but for some reason, battery life plummeted by about 2/3. Did a battery pull and that must have cleared something up, because my battery life improved.