Mine can't be charged either. The reason is that the battery cannot be charged for a long time and the voltage is too low to charge. There is a way to reactivate the battery. Use a knife to open the back cover of the glasses. You will see a battery as big as a pinky finger on the right side. Remove the battery and connect the positive and negative poles. a 6~8v charger. Wait a few tens of seconds, the battery can last longer if it does not heat up. Then reinstall the battery and use USB to charge it. If the red light stays on, it's a success... Here's how mine works... If you don't want to take the glasses apart, you can try cutting the USB. cable and use a 12V charger to separate them. Charge for a few seconds... Theoretically it's possible, but I haven't tried it. If you're unlucky, your glasses will be bspent.
Simply spend. 10 yuan at a certain store to buy a new battery and replace it. Replacement steps:
The first step: take out the glasses, find the right leg side of the glasses without the switch, and use a needle to push it up and down
The second step: remove the hardware terminal. Just see the battery.
Step 3: Replace the battery and pay attention to the positive and negative poles