Your cell phone battery states that it has a capacity of 1200 mAh. That means it can provide constant current supply of 1200 mA for 1 hour, if fully charged.
a) What is the total amount of charge in Coulombs unleashed by the battery if it is fully discharged?
b) Your battery provides a constant voltage of 3.7 V. What is the energy in Joules stored in the battery?