It doesn't take replacement batteries. It's an Olympus with a proprietary battery and has an adapter that plugs into the wall. I can't find the adapter and the more I look, the more I become my blood pressure rises.
I have a Diablo Delta chip that I intend to dial in for the KB but, at Jimmy V's good suggestion, I grabbed the KB flip chip for a backup and good measure. Comes with chip, wires, switch and emory cloth to clean the computer contacts.
The switch indicators are labeled "Shootout" and "Power" to represent the two tunes in the chip. Hmmm...perhaps "Street" and "Strip" would have been less ambiguous?