How to get a watch to work.

Yes. It uses solar power only. Its battery is weak. Electro help

It sounds like you have had trouble with this from day one, the problem is the solar cells are not charging the battery, or the rechargeable battery is defective. I recommend returning the watch if warranty is still in place.

Change the capacitor. This is the thing accumulating the energy. As the ordinary batteries, it may go bust, so, all you have to do is to replace it. There is no such a name as power cell in Citizen EcoDrive watches - there are CAPACITOR. Capacitor absorbs the energy from the light sensitive panel(s) and dispenses it in the ordinary battery manner. Advertisements are saying that you will never have to change the battery - that's right, because there are no batteries at all. Instead of battery there are CAPACITOR, but nobody says it will last forever. Rate me, plz.

If it is a quartz watch more than likely it just needs a battery. If it is a citizen eco-drive it may need sunlight as it is solar powered.

A "non" fully charged watch will sometimes "jump" seconds rather than indicate one second intervals. Charging these small solar panel watches takes forever, in BRIGHT sun. Have you tried leaving it outside, in the sunlight, for at least 12 hours?