Question

The all-new iPhone Xs has a 2716mAh Li-ion battery. After a full charge, Lee used it for exactly a full day without recharging, leaving 15% battery in the phone. If the voltage of the battery is 3.8V, estimate (1) the average electric current (in Amperes), (2) the total amount of electric energy (in Joules), and (3) the average power (in Watts) that Lee’s iPhone Xs consumed during that day. This battery only has a mass of about 50 grams. As a comparison, search online and then estimate the amount of energy released by the explosion of 50 grams of TNT.

Answer 1