Hello I've had my citizen Eco drive skyhawk watch for at least ten years now. I remember reading in my manual years ago that a battery needed to be replaced even though it's solar powered. My watch went dead today even tho I remember seeing two bars of power left.

Dont look any further. Send it to Citizen: Full particulars can be found here: http://www.citizenwatch.com/

The watch has a "battery" and claims that it does not need to be replaced but perhaps it needs re-charging. If you go to their web site (click on the link below), there is a full explanation of re-charging requirements :-
http://www.citizenwatch.com/COA/English/rechargeguide.asp

Hi, This watch is Calibre C651, same as Model #JR3090-58M (Promaster Air Collection - Blue Angels Skyhawk). C651 is not available on Citizen website, but you can use Calibre C650 instructions. Download PDF manual and follow instructions on page 3. They are pretty detailed, so take your time, and you should be successful. If you don't have the manual, Try this link:
http://www.citizenwatches.com.au/instruction-manuals

Take the four-digit Calibre number (C651 or C650 in this case) from the back of the watch, enter it, and download a PDF of your watch setting-instructions/manual.
I hope this helps you. Thanks, Bill

If this watch is several year old, it could be that the power cell is defective, and won't hold a charge. I have been also told by a Citizen Tech, that they will sometimes "hangup" or lock up, and may just need a quick jolt. This doesn't happen often, but Citizen has the equipment to test and supply this jolt to sort of kick start the movement again. They would also replace the battery while it was open. You can sometimes place it into direct sunlight for 15-30 minutes, but no longer...unless you want to melt the insides...lol.

Most Geniune Citizens have a five year warranty. Keep that mind too. Thanks.

http://www.citizenwatches.com.au/instruction-manuals

You will need the calibre number on the back of the watch but try this citizen site.

After charging the Skyhawk/Black Eagle watch, you need to reset it.

Here's how to do it:
Turn the crown (knob) until it's in chronograph mode (CHR), then pull it out to TWO clicks. Push both buttons at the same time and the display should turn on. The push the crown back in to complete the reset.

If that does not work and you are 100% positive it should've charged...take it in for service. It could be a bad battery (rare).

try to let it set in full sunlight for the whole day. if it dosn't come bake on you need the battery replaced. And yes they do have bartteries thats how it hold a charge over night. but these batteries are not cheap, but worth it to keep a skyhawk going

Go to this site and choose interactive settings for your watch:

http://www.citizenwatch.com/COA/English/find.asp

Do not forget to rate, please.

Go to Citizens web site and find your model. You can down load the instruction manual there.

Go to this link and pay particular instructions on how to find your watches movement or caliber number.
http://www.citizenwatch.com/COA/English/settings.asp