Citizen Eco-Drive

Another little gem I have come across. This watch had been in a drawer for about 8 years, so when I got it, it did not run, but the second hand just flicked kind of. I googled it and found just about all faults with this watch the second hand will tell. With the flickering hand it stated low charge, sit outside for a few minutes, presto, ran, runs like a top, no time lost at all over 4 days, any info appreciated.
Thanks,
Bill

I have found that all is needed is putting the watch in a window sill in the sunlight and I have had one that took a couple days and it was as good as new.