From that thread
"I received my buttons yesterday, as always great work. (Hmmmm I guess I write always the same when I received a "Steve Ku envelope"... but it is true, always A+ stuff)
Btw. I must agree Eric, the haptic of the original button is slightly better, but my V10R Ti will also keep the button since it looks cool and works well.
I have a small question. On the switch electronic there is a small button cell. What type is it and how long will this cell last. Will this cell drive the switch electronic or how is this managed? Do you have a public source for such type of cells?"
Just found this in the thread, but didn't find an answer.
I had my button apart to redo the tritium and saw the cell.
Its even held in with the usual button cell clip. If its not a cell id be shocked. Id take mine apart, but man its a pain to reinstall. Lol