This replacement battery, is a Sony Alkaline Battery which has an average life of 1 to 2 years. It can be used in all of the watch faces found in our store.
To replace your battery, you must remove the back plate, this can be done with a fine flat screwdriver (eyeglass flat screwdriver.) There is a small lip in the back plate of the watch casing. Place the fine tip of the screwdriver under the lip to start, while gently applying pressure work your way around the edge lifting the plate until it snaps out of the watch casing. Replace the battery, then place the watch face down on a flat soft surface - a mouse pad works well- snap the back plate back into the casing, this may require strong pressure and sometimes a tap from the handle of the screwdriver.