A new study has revealed exact figures on how much money users spend charging their iPads and iPhones. According to the Electric Power Research Institute (EPRI), charging a current-generation iPad every other day from completely drained costs the user $1.36 per year. The study's intention is to evaluate the United States' year-over-year power use, but EPRI extended the test to understand whether the rapid growth of tablets in the "post-PC era" is adding to power consumption, or reducing it.
