Unless it has built-in low voltage protection, I’d recommend you get a cell with protection built in.
I suspect the light doesn’t draw too high a current, almost any protected cell will suffice. Do however check whether the top of your current cell is a button-top or flat-top and buy a similar cell.
Lastly, don’t buy cells on ebay/Amazon/AliExpress/Temu/etc as there are lots of “fakes”. Try this thread for reliable retailers in your country.