Voltage for step-up regulator U3V16F15

Hi, I recently purchased a U3V16F15 voltage regulator to control a motor. I connected a 3v battery in, where it registered 3.19 v. When I checked the voltage out it only registers 4.5v. Any ideas why it’s not stepping up to the 15v it’s supposed to?

Thanks,
Bill

Nevermind my original question. After some additional testing, I determined there is too much resistance in the wire/ connectors between the battery and the voltage regulator. It can’t supply the necessary minimum voltage for the regulator to operate at startup.