How long should a battery last in a watch?
This is not a question that can be answered with just one answer. There are many variables. When a watch is brand new the battery that is factory installed will have the longest life. The reason for this is because the watch is in its best condition. Everything is working properly and it is well oiled and clean. Some people have claimed that their battery has lasted up to five years or more.
When a battery is replaced in a watch, it is important that a jeweler or a professional is doing the replacement, there are many things that can go wrong when people attempt to replace a battery themselves. Inside a watch is very intricate just merely touching the wrong part can cause damage to the movement. It is best if you want to extend your watch's life to not attempt this yourself. The cost is minimal to replace a battery but the cost to replace or repair your watch can be expensive.
As a watch gets older, the oils in the movement can dry out. This puts more strain on the battery which causes battery replacement more often. If you are replacing a battery every 6 months there is a good chance that something is wrong. A cleaning or an overhaul might be needed. There also could be other reasons that the watch is not running properly, however most cleanings and overhauls do the trick. If you have this done by a professional you should expect that there be a guarantee on this work. We offer a one year warranty for the movement work.