Buying a new keyboard

So, I bought a new keyboard just to get some distance from my laptop's screen, which I also just bought.

I was in such a hurry to grab a wireless one because I needed time to find a jeepney ride home on the last day of the year. I didn't even check if it was Bluetooth. Turns out, when I unboxed it at home, it is wireless but it needs actual batteries. I totally thought I bought a rechargeable one. LOL.