Sorry if this is a dumb question, but after spending the most I have ever spent on a camera I want to make sure it is free of defects before my return period runs out with B&H. I received a generic PAWA battery with my kit and have never really used it until recently. Yesterday after letting my camera sit overnight I decided to remove the battery and keep it stored until the next time, but when I removed the battery I noticed a small drop of what appeared to be oil. I rubbed my finger on it and it rubbed off fine, but I'm not sure what that was. I inserted my Canon battery and checked it, but it looked fine and free from that oil substance
I have read that DSLR's have lubricants, but those are primarily located in the shutter. I am not sure if this could have happened during the manufacturing process or possibly from my hand. I doubt it was water due to it remaining on the batter overnight.
Any help would be appreciated.