Better would please me in a pair of spectacles in this price range, the power supply with button cells. If the 3D glasses is rarely used, the battery is then mostly empty and possibly wg. even deeply discharged the self-discharge and already damaged after a short time. and then? Throwaway ...
I had bought the glasses for Benq TH681. After this WG. has proven the rainbow effect and the loud fan as bad buy, I wanted to return these two spectacles.
The glasses come directly from Hong Kong (hence the long delivery time), and the shipping costs for the return shipment via DHL amounted to 15.90 (there were only 3 it!?). Because, unfortunately, remains only the resale ...