My D100 is newly installed and has about .4hrs of ground run time for testing and calibration. The VMETER shows the current voltage (fine), 0.0 on the enternal battery (E) because there is none, but I purchased the internal backup battery (I) which shows 0.0 as well. I connected the "stay alive" wire to the power side of the aircraft battery and left it for over 24 hrs, but no charge. I did not receive an internal battery in the box with all the ordered components when delievered so I believed it was installed. Maybe not? Should there be a voltage level displayed at this point? The installation manual stated that the "stay alive" would draw at a higher rate to charge the internal battery as opposed to the draw that maintains the clock. Should I disconnect, remove from the tray, and open the door to see if the battery is there, or is that still premature?
Thanks again for all your help in the past!!