What was the degree of energy of the cell phone to start with? That is a good point. Ensure that you was an European study, a hand phone can put out a maximum power of 2 watts. Within the United States, for you to conserve energy, and "talk time" cellular are in order to operate at lower levels, close to just one mill watt in instances. US cell phones have a maximum vitality of of a watt. 25% that from the European maximums. This isn't taken under consideration.