LG Electronics AG-S350 Active Shutter Glasses for 2012 Plasma TVs (Discontinued by Manufacturer) Rechargeable batteries means you never need to replace them, simply recharge them when needed. Comfortable and lightweight for hours of enjoyable viewing. These glasses are only compatible with the PB6900 PM4700, MP6700,PM6900 and PM9700 family of TVs. Rechargeable Battery (approx. 1.5 hrs recharge time for 4 hrs of use)