What would it cost to replace a battery in a watch and what would it cost to replace the glass cover on top of the watch

Petra Lala. Watch batteries start at $12.95 and the price goes up depending on the type of watch you have. Crystals usually start at $35 or so. Again, depending on the watch itself and the type of Crystal your watch has. You're more then welcomed to take it in and get a price on the spot.

You usually have to bring it in and they determine a price, on the spot, off the watch itself. Different watches use different batteries, crystal sizes, and crystal shapes.