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LGR Oddware - Sony Glasstron HMD from the 90s - YouTube
Amazon.com : Replacement for Sony PLM-A35 (Glasstron) Battery and Charger with Car Plug and EU Adapter - Compatible with Sony NP-F550 Digital Camera Batteries and Chargers (2200mAh 7.2V Lithium-Ion) : Camcorder Batteries :
Sony Glasstron 3D vision VR headset PLM-50 PLM-A35 PLM-A55 li-ion battery pack | eBay