What is the most likely replacement battery for a men's guess waterpro multi-function watch?

Answer 1

You can just take the watch to the wal mart jewelry counter. They'll have tools to remove the cover. Once the battery is out, they should likely have a replacement for it.

Answer 2

go here and do a power search, you have to have the part number
http://www.batterycountry.com/ShopSite/watch-batteries.html
and here's a site where you can talk to a service rep/sales during business hours
http://www.boscovs.com/StoreFrontWeb/Product.bos?assortmentDepartmentNumber=3753000&itemNumber=24309&assortmentId=10&type=Product