I have no problem with these 3D glasses when plugged in and working. There are only two problems, the first is that they are weak, but that doesn't matter, just don't try to fight them. The more serious problem is connecting them to the projector. If they are disabled, the button will not work at all. No lights on or anything. Then they are fully charged. So you have to plug them in and hold the button down when you plug them in. when you let go the button no longer works. You need to disconnect and reconnect them. Therefore, in order for them to work, you must connect them and hold down the button until they are connected. There is no other way. Once connected, they work flawlessly. It's the same for both pairs I have.
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