How come no one gave you suggestion?
go to any watch store, they will change the battery for you around $5.00.
Sometime, taxes included.
the Cheap way and if you are handy, open the watch back cover, find out the size of the battery or the number of the battery, e.g., 327, or 337A etc. go to dollar store to buy some ( sometime, one dollar for 5 of them)... depeding on the size and the store and your luck (how long the battery has been in the store)...
