Hello i need to know what size needs my watch number si 113005-12036384 battery size

sorry we can not help you . . losing things is not our problem it is yours alone . go to jewelry store and ask them to replace it

When you open the watch, the old battery usually has a number on the back, for example, CR2025

If that is the same as yours, it is easy to buy another battery at most retail stores and online with Amazon or eBay.

1.800.677.8278 All I can find is a phone number. Hope this helps.

I just opened my watch to replace the battery. The number on the battery is: SR920SW
Hope that helps.

Give us : make, model and all the writings on caseback. Photo will make it easy as well.

I have not figured out how to open the casing lid to replace the battery, but the number for the battery you need should be engraved on the lid. Double check your own lid, but mine says that the battery is an SR621SW. I'm sure there are different brands that would match this number.

the size cell that goes in this watch is a 395...good luck :)

I was shopping for one in Thailand and it was a GE 371. I did not replace it because they only carried the cheap china battery's.

We need to know movement number to find out exact battery for your watch. Number is pressed on movement plate.