1: are you sure this is a real Casio DW-6900 model?
2: Why do you change a battery of a brand new watch. This module is so new it's almost inpossible that the battery is dead...
I haven't opened yet a new G with a new module yet (mostly due to Q2 above).
As I look at your pick, the battery lock system works similar to the previous systems, but is locked now on three positions.
Sent using Tapatalk!