Oh dear, we have the same questions going on in three different threads, mostly my bad. There's fx questions in the official MR thread, then one done in Watto's.
There are to the best of my knowledge five that were released that required six batteries and had varying degrees of electronics (i.e. the blade lit up entirely, or the light moved
up the blade; also the quality of the sounds was somewhat variable.
The first five were:
Anakin AOTC blue blade
Darth Vader ANH
Luke Skywalker ESB blue blade
Luke Skywalker ROTJ green blade
Mace Windue AOTC purple blade
The new sabers being released from the MR site are:
Anakin ROTS blue blade
Vader ESB red blade
Luke ESB blue blade
All three are the "improved" electronics.
plus the Mace saber is being re-released apparently, but I'm not quite certain which version it is: six battery or three.
A nifty link courtesy of Beth in the proper thread is right here
Thanks again Beth