Sure. The specific wireless one I have is this one. There may be better ones on DX now, but that's what was available when I went hunting a few years ago.

It uses a type 23A (12V) battery in the remote (same as inside my Subaru key fob), and a CR2 (3V) lithium battery in the receiver.

DX has both kinds of batteries cheap(!) in packs of five (and I've just now ordered replacements).

The wireless flash relays I have from DX also use the CR2 batteries.

Cheers