The camera and the motion sensor both run on 6 volts. Before they each ran on 4 AA batteries which had a 8800 mAh total capacity. now the run off a 6 volt lantern battery with a 54,000 mAh capacity. I never used my multi meter to test how my amps they drew because I knew is was a very low amount. I was only concerned with capacity so I would not have to change batteries so often.