I have some bad news. I'm really sorry to report this since I initially found the Monster/Optoma 3D glasses to my liking. I liked the fit, comfort, image quality, and field of vision. I have a Epson 6010 and 2 pairs of Epson glasses. They don't fit on me at all. I bought 1 Monster 3D kit and 3 Optoma glasses. All worked initially. After only six hours on one, it died. It was weird because it was fully charged. When turned on, I got the three slow blinking lights indicating it was above 50% charge. In just minutes, it stopped working right when movie viewing. It wouldn't turn on, no blinking indicator lights. When I plugged it it, no charging light. After I left it to charge for a few hours. Nothing. It was dead. It was still within amazon.com's window of return, so I sent it in for refund.
Just today, another one died. Couldn't turn on. Couldn't recharge. Nothing. That's two out of the four that had less than 10 viewing hours on them completely die. I was at the last few days window of return, so I just mailed that one back to amazon as well.
Even if the remaining two work, I will now always worry that they will die in the middle of a movie - never again to be revived. Totally unacceptable - especially when I have guests over. I need something reliable.
At this point, I must give these glasses 1 out of 5 stars and warn all potential buyers that they are unreliable. I will update this thread if any of the remaining two also die.