Just buy and wear, no need to look for a battery, go to a repairman, there is no need for this when the watch is ready to be worn right away.

I combine goods.

Up to 100 grams worldwide (except the US) $8.88 (US $19.99) for 1 to 3 watches (depending on weight).

Up to 500 grams worldwide (except the US) $12.22 (US $20.99) for 3 to 10 watches (depending on weight).

Up to 2 kilograms worldwide (except the US) $15.55 (US $25.99) for 20 to 40 watches (depending on weight).