I’ve worn this model for about 5 years. The eco battery no longer holds a charge for more than 12 hours. I put it in full sun daily for an hour, but the watch stops overnight.
I bought my watch before Christmas. I love the 'never needs battery' feature. It is keeping good time. My only issue is the luminous hands do not light up in the dark.
I bought this watch yesterday. Citizen is a reputable brand. There was no documentation or tag in the packaging that gave model, or serial number making it impossible to register it. The information on the watch back is too tiny to read. I am skeptical about the solar power but am willing to try because of the convenience of no batteries to buy.