ECE112 
Current Charge and Voltage Problems      

Note: The assumption is that the appliance or device operates until the last coulomb 
      is used. 

4. Your laptop computer runs for 45 minutes before its batteries are exhausted. 
   While running, the computer draws 350mA. 
   a)What is the Amp Hour rating for the battery? 
   b)When fully charged, how many coulombs of charge are inside the battery? 
   Ans: 0.2625AH, 945C