D500 used three batteries on 1600 pictures, all Li-ion01. I bought two new batteries Li-ion20, but the camera does not go into standby mode, even when c2 standby timer is set to 4s. It seems like the new batteries drains at a speed of close to 10 % per hour, which is unacceptable for me. Is this a only my camera problem, or a common problem? Have changed between oem lenses and sigma lens 50-100 1.8, no difference, same also with Voigtlander 58 1.8. Have also changed memory card and formatted, no help.