Battery issues,......

I have had exactly the same problem, less than 2 years old, stays on medium and drains very quickly. Having had a look at the manual posted by Robotek I left it in full sunlight for a couple of days and it is now on full for the first time in 6 months. It is a limitation of the cells so I have just accepted it, it's still a great watch.

So - try it in FULL AND DIRECT sunlight for a couple of days and if this doesn't work maybe it does need a new battery. Not sure how this will work in the winter, but sitting on a table near a window didn't charge before it either.

My G-Shock is doing the same thing, it won't stay charged for more than a day, and it's only a couple years old. Does anyone know how long it should take to fully charge?

My GW-300 also started losing the ability to fully recharge recently. I ordered a new rechargable battery and after replacement it works fine again.

I have the same watch and mine just started flashing charge also. I am going to replace the battery and see if that doesn't fix it. I think the fact that it is winter and the watch hasn't been exposed to much sunlight has a lot to do with it.

same problem. Goes to Medium, backlight doesn't work, watch less than 2 years old