The foolproof way of extending battery life, which is to make the phone thicker, has been roundly rejected by the marketplace (and there are many benefits to li

The foolproof way of extending battery life, which is to make the phone thicker, has been roundly rejected by the marketplace (and there are many benefits to limiting the number of models, so most manufacturers won't make an "extended battery" model). Battery life is also important to me so I take an external battery everywhere I go.