vne147
Member
Ok, so this is probably a stupid question but I just want someone to verify that I'm not out to lunch on this one. I have a circuit that I made that will draw about 500 mA. The power souce is 8 AA batteries wired in series so the supply voltage will be approximatley 12V. I'm trying to figure out how much runtime I will get out of the batteries. I am assuming that each battery will supply 500mA/8 = 62.5mA of current or roughly 1/8 of the total current draw, correct? If the capacity of each AA is 2100 mAh then the 8AAs should be able to power the circuit for 2100mAh/62.5mA = 33.6 hrs, correct? I understand that the assumptions and thought process that I used are for ideal circumstances and that the real world is not ideal but is my thinking correct? Thanks.