How Long Will Li-Ion Batteries For X-E1, X-Pro, X100, X10 Be In Production After Cameras Are Discont

I was just wondering, since most Fujifilm cameras(not only the X-Series) operate on special Li-ion batteries and not the common AA or AAA standard-sized batteries, how long will these Li-Ion batteries be in production after the cameras are discontinued? In other words, usually how long will the cameras be supported after tehy are replaced wtih newer models? 1 year? 2 years? 5 years? The new cameras from Fujifilm(X200, X-E2, X-Pro2 etc.) may use a different type of Li-Ion battery.

It would be a disappointment if one cannot find or purchase suitable batteries for a working camera, considering the short life span of the rechargeable Li-Ion batteries(about 200 or 300 chargers the last time I read).

Any insight or thoughts would be appreciated.