All i can say about fake/copy AAP is that is become soooooooooooooo good that you cannot differentiate the difference except;

1. "Not Your Airpods" for first time connection
2. Cannot update firmware

But how you want to know than use it first; which mean have to buy it anyway.

So please, REFRAIN from buy new/secondhand from Shopee/Carousell/Mudah.

Better go to Switch/Machine/IT World/PC Image and buy it from there.

Next to none.
They have been so good until it could fool the best.
so just buy from SenQ/PC Image/IT World/Switch/Machine.

Firmware yes; but the thing is you cannot know the firmware until you need to buy it, right?