I have a DI2 ultegra that I picked up here and it all works just trying to figure out how to check the battery and if my charger is working.

1. I have the SM-EW67 junction, with road shifters it says press up/down buttons at the same time and it shows battery level on LED's, if I press the 2 buttons on my tt shifters (rear d up/down) it shows red.
If I unplug the battery and plug it back in the LED's flash Green. Whats the correct way to determine charge level ?

2. When I plug the battery in the charger (external Battery) it doesnt light up, is that normal for a fully charged battery? I road about 300mi pulled the battery and put it on the charger and still no lights? Does it only light up if the charge is below a certain % ?