The obvious difference between Passive and Active 3D TYPE is :Passive 3D glass do not need any battery or charge; 

Active is need Charge or Battery to use. 

Before you buying, please check this 3D Glasses is only for Passive circular polarized 3D Type TV. Do not need any battery or Charge.

Passive 3D Glasses with Polarized Plastic Lenses for Vizio 3D Passive Digital HDTV

Quantity:1 pairs clip on 3D glasses

100% brand new

Colour:red-blue

Made of durable material

Size: around 13CM*3.8CM

Clip-on 3D Glasses suit for: VIZIO Passive 3D TV, 3D IMAX Theatre; VIZIO 3D Blu-ray DVD