10 Ways to Extend Your iPhone's Battery Life | Law Technology News. I got a kick out of this LTN post about iPhone battery life, and the tips and tricks to extend it. I have a modest proposal for all iPhone users who want longer battery life. Buy an Android phone. Most of them have a really cool feature. You pry the back off, pull out the battery (just like your kids' toys), and insert new battery. Always keep one charged and in your briefcase. Android...just one battery trick required.