The following three graphs compare rival products. The Blackberry used the most power and the Droid used the least. That means the iPhone used less than the Blackberry, but more than the Droid.The below two graphs compare the electricity use of a PC laptop and a Macbook. They use relatively similar maximum power. The graphs look fairly different because the Macbook started out in “sleep” mode, then powered on and then browsed the internet while the PC was already on, but then browsed the internet.