Citizen Chronograph World Time. Read details before buying!

*Please select Royal Mail for Postage I don't use the others and am only a few minutes from my local Post Office...* I've had this a week, it came in a box with other watches I bought recently, It works and the functions and resets all work too BUT it only holds charge for a couple of hours in the dark overnight. I don't know if this is maybe because it needs to be left in direct sunlight on a windowsill for a good few days or not - and we've had no sunshine for what feels like weeks now! If left in a room with a light on overnight it works fine and keeps time. I checked the solar battery when I opened it (to see what model I needed to replace - I didn't replace it) and the charge on it was 1.48v so unsure even if the battery is the issue (may well be though?). A new solar battery is £18 from Fleabay. Apart from that and the scratched class (which isn't as noticeable when wearing as it looks in my pic!) the case and strap aren't in bad condition at all and still looks good on. Strap is slightly loose on my 7.5 inch wrist. A rare model and silly-expensive when new! £24.99