qqp question1: The Nexus 4 comes with a charger with an output of 1.2A . If we use another charger with an output of more than 1.2A, does it affect battery life? question2: What effects does a 2 amps output charger have on the long run battery life of the phone? Why do cellphone companies provide a 1 amp instead of 2 amps charger?