Thrunite Ti2 on Li Ion AAA sized (10440)?

After putting Li Ions in an SK68 and seeing the difference vs the 1.2V NiMH, my next thought… hey why not try it in my Thrunitr Ti2.

Will this kill the LED or driver (not sure if the board with the spring qualifies as a ‘driver’ since I haven’t taken it apart and seen the back side).