There&#x27;s nothing wrong with the iPhone&#x27;s battery life - the problem is more likely where you use it.  Almost any phone&#x27;s battery will last for days in a place where cell site antennas are dense and close enough to provide connectivity without making the radio work very hard.<p>I was surprised to find how much battery I had left at the end of the day in a major Indian city, as opposed to in San Francisco. One or two bars of signal strength may be enough to make your phone useful, but it&#x27;s no good for one&#x27;s battery life.<p>Recall that the radio power-to-distance function is logarithmic.