Testing the iPhone battery is something that requires expertise that the ordinary user of iPhones may not have, which means that one is then dependent on needing to read up reviews of how well or badly does the iPhone battery work. It certainly pays to do some legwork before buying your iPhone as you do not want to end up with something that is going to fall short of your expectations and which may cause you disappointment as well. Thus, before you actually purchase your iPhone makes sure to check out the many reviews that are available regarding the working of the iPhone battery among other features.