Yes, the push-in type of charger will work with all those models and 901
batteries will screw into the KR808D-1 screw-in charger (since the threading is identical). Whether there is any complication due to the different voltage and mAh of the Kr8 and 901
batteries, I don't know.
If you already have 901
batteries, I suppose you want to keep using them. However, I suggest that you don't purchase any more of them. The Kr8 battery is both higher voltage (true 3.7V) and higher mAh (280 mAh) than the 901 battery and works just as effectively with 901 atomizers (actually more effectively, because of those attributes).
As for '808', indeed the KR808 is a different/incompatible model from the KR808D-1. However, since I know of no westerner who uses the KR808, the '808' abbreviation is frequently used for the KR808D-1. I prefer the Kr8 abbreviation; among other reasons, to eliminate confusion with the
DSE808 (virtually identical to the Janty Stick).