Got a watch a while back as a graduation present, it is a Seiko Kinetic Sports 50, I believe the model is a 5M43 (posted below a scanned image of it). I get two, maybe three days best on a full charge with the watch. I found this disappointing, so I started doing some research and found some information that the capacitator (which is the battery I pressume) is either faulty or an older type that was put into my watch, and that with a newer capacitator the life on a full charge would be greatly improved.
I have no scrupples taking apart something delicate so long as I have the proper tools and know how to do it properly. However, if anyone has a moment to browse over the links below from the information I've gathered and shed some light on the process of replacing the capicitator I would much appreciate it.