is it possible to connect a 2.4g controller to my phone?

you would have to consult the manual that came with it

I've had a similar problem with a regular xbox controller. I removed the brand new batteries that came with the controller and replaced with some I had from the store. Haven't had problems since.

Something else to keep in mind though is, xbox controllers run off the 2.4G band. If you have your gaming divice connected wireless to a 2.4G internet band, your xbox controller could be fighting with the signal causing intermediate issues.

I'm having the same issue. Connecting to 2.4G Cisco WAP371.

ive already said my xbox is NOT on wireless. All ports were opened a long time ago using portforward.com. no need to change my internet channel cause it not on wireless and even if it was i would connect it to my 5G connection not the 2.4G like hones use.
i am already aware about signals so i have my computer and my xbox (when i use wireless) on the 5G connection (my router sends out both 5G and 2.4G signals)

Nope, that's not possible
But, if you connect the controller to your phone you can see the percentage
Some Android phones and iOS devices do that