In the 3D TV world today, there are two main technologies that the sets use. There are active 3D glasses that use batteries to show the 3D effects to people and there are the passive sort. I have tried both and honestly, they seem pretty much the same as far as performance. I have long thought the only reason TV makers use active glasses is to gain another source of income from those that upgrade. The passive glasses are very cheap and make entry into 3D viewing in the home cheaper.