LTC4162 Battery Drain Current on Demo Board DC2038A

Hi All-

I'm evaluating the LTC4162-L for a solar charging application. I have a DC2038A-J demo board to run tests. when I tried to verify the 54-100uA battery drain current when the input solar panel is dark, I measured 15mA out of the battery. There has got to be something else running on the board, but I'm not sure what. How can I verify the 54-100uA of current drain from the battery with a dark solar panel on the DC2038A-J?

Thanks so much!