I just bought a GW-300 that was totally dead. I opened it up and silicone greased the gasket and put it back together and was waiting for a new CTL1616 to come in the mail for it. I assumed the original battery was one of those defective units we've all heard about. Anyway, I toss it in the sun just for fun with the old battery in it, and low and behold it comes to life! Low, medium, and then high, and it took pretty much the time that the manual says it would to reach the levels in direct sunlight. I let it top off for about 4 hours then wore it for about 8 hours and then last night I hit the EL button about 8 times in a row to see if it said recovery ect. and it didn't. Syncs perfectly, seems to be fine in all respects. The previous owner says he's had it for about 7 years or so and it only died in the last few weeks (I'm guessing from dark storage conditions). Does it necessarily hurt or kill the solar cells if they happen to drain all the way down? Is it possible for a CTL1616 this old to still be perfectly fine? I dunno, people always say these things die in a couple years, but if my cell had problems wouldn't the watch go into recovery all the time or not reach high charge ect?