|I do not know why you are asking about an internal battery which is probably like the battery on your computer motherboard but smaller to keep the settings and would have nothing at all to do with the charging of the main battery in any way.|
If the new battery is also not charging then either the new battery is not good or the charger or possibly internal charging circuit is bad. To test this use the charge/USB cable and plug in your camera to your computer. If the battery charges off the running computer, repeat with the other battery. If they both charge then the charger is bad and you need to replace it. If it still does not charge then bring the camera, charger, and both batteries to an authorized service center for further testing.
You have to be a little bit crazy to keep you from going insane.