Checking for answer to previous message??

A person with this number called me at approximately 5:00pm Central Summer Time, Australia asking for an unknown person. I explained the he must have a wrong number and he asked what number he had called. Without thinking I answered and he confirmed it was incorrect. He didn't disconnect the call but I did.
A short time later I discovered that my battery was excessively low in a very short time.
Is there any possibility that I could have been scammed?
Please advise.