I Loved my X2 until the 4mm connectors pushed in to the charger. I opened it up to see the mounting posts had split and the tiny screws holding down were bouncing around in the charger. All they had to do was put longer screws in, the part was cast with holes all the way to the bottom of the case. While I was in there I disconnected the way too loud Beeper thingy. I confirmed the location of the audio with the highly scientific finger method . I'm sure Hitec would not recommend what I did here, It worked great for me. Hopefully this can help someone else.

How I did it

Remove the 5 screws from the bottom of the charger.
Gently pry between the red and black case to open it up watch for the clips that snap the case together.
Unplug the 2 gray wires that plug into the LCD board
You can gain working room by unscrewing the 6 screws holding the LCD to the top case.
I was lucky and found the 2 broken plastic pieces for the posts that the 4mm connectors mount to
Super glued the crap out of Plastic pieces back on the posts them and let them dry
Drilled out with a #38 drill ( I started with a #39 but it was too tight)
I ran a 3mm screw through the first post and cracked the piece off again, reglued and redrillled (#38 this time both posts ).
I ran a 3mm screw through both posts to get some threads going, I went nice and easy back and forth, got some threads established
Drilled out the board with the 4mm connectors for the 3mm screws
I put a coulple of dabs of shoe goo on the posts and ran 3x15mm screws in and snugged them down.
Reassemble, watch out for the wires in the front, it's a tight fit.

The super loud audio noise comes from the black circular thingy on the top left of the board. I was originally gonna put some tape over it but it is directly over the top of the fan. I don't need any more issues. Back together and working great and quiet.

Thanks for showing "the guts" of the charger.

I see you have your balance boards on the side of your charger. That's what I was contemplating on doing as well. I prefer chargers with built-in balance connections, but sometimes you have no choice. The balance boards/adapters feel a bit fragile, and I have to be careful when moving the charger in, and out of the garage. My WiFi adapter is currently Velcro-ed on the side. Seeing your post has prompted an urgency to get mine done.

Just an FYI, the buzzer can be turned off in the System Settings. Just in case the hack doesn't hold up, we can always replace the bottom case for you.

I got mad with the charger's noises too (especially in hotels) but looked into the settings and found it. You probably should reinstall the speaker and turn the sound off in the settings just in case you ever want to turn them back on again.

You know I remember looking through the manual thinking there has to be a way to shut this thing off. I was probably in my typical big rush and just didn't see it. Good to know for other people, I suppose I could always solder it back on if I miss it. I think it is a great little charger for the price and all the features it has. If my hack fails it will probably be time for a new charger. See what Hitec is making then.