I still want to know the proper way to open it. Less than 30 days after purchasing, it no longer works without being on charge and while on charge it spams the TV with charging/battery full message. I am going to fix it, not pay $1/day to use this piece of plastic.
At less than 30 days, I’d return it to the store for a refund or exchange. But if you really want to, people have pried them open. Here’s a thread where @renojim shows a picture of one that has been opened.