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My Frogman GW200 is ten years old, still says it is fully charged, but the light function is so low as to be non-existent...it needs a new battery.....I would consider myself lucky if a rechargeable battery lasts 10 years...
 

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My 3 year old m100sb has never left high charge. When I got it, it was on medium charge. Usually I have to replace my batteries after 1-2 years, so currently it's working out great and saving me money in the process.
 

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my riseman was having fits so i decided to open it up and administer an ac reset. i was shocked to see that the battery installed in it was a cr 1616 instead of the regulation ctl 1616.

the watch was bought in japan and was essentially gifted to me so i can't really complain because it is after all, a humdinger of a watch.

it just goes to show that you can't always fully trust a seller no matter what the nationality.
 

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my riseman was having fits so i decided to open it up and administer an ac reset. i was shocked to see that the battery installed in it was a cr 1616 instead of the regulation ctl 1616.

the watch was bought in japan and was essentially gifted to me so i can't really complain because it is after all, a humdinger of a watch.

it just goes to show that you can't always fully trust a seller no matter what the nationality.
 

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I got my protrek about 15 years ago. I used to wear it only in summer and put it in drawer in winter time. The battery got completely drained out every year. But it always came back to life after a couple hours sun shine. I am very impressed with the battery quality.

Now I got a coolfire led , I charge it regularly.
 

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It would last as long as the watch in most of cases providing that the charging circuit also works, but its capacity will decrease over the time. At some point your watch might be unreliable.
Sorry for resurrecting this old post.

Thank you for pointing this out. I have not thought much about this before, but of course it makes perfect sense.

So far I have always read about fans, who have managed to restore their batteries with some baking in the sun, but I have never read how well or how reliable those watches have worked afterwards.
 
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Also I once used to think that the CTL-1616 was some type of capacitor and learned only rather recently, that it is actually a rechargable battery.
 

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Thinking about it recently. I came to the sad conclusion that there isn't a end all be all watch that you never have to worry about. These solar powered watches will eventually need a new battery. And probably before that the watch will need an inspection for water resistance. I debated G-Shock vs automatic watch. But it really is a comparison of the amount of time before some kind of service. I still love my solar powered G-Shock though.
 

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This answer is DEFINITIVE, not vague:

Casio solar cells will last the life of the watch, 20 years, if charged periodically.

The original Tough Solar G-Shock is the Raysman, released in 1998 and all still going strong on original batteries


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Guardian Angels DW-9300GA



Raysman DW-9350 MSJ Middle Sea Race



Galapagos DW-9350DJ titanium



Fixed the pic links^^^

Some of these are now 22 years old, on original battery, still holding full charge.

Still have never changed a solar watch battery.
 

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Fixed the pic links^^^

Some of these are now 22 years old, on original battery, still holding full charge.

Still have never changed a solar watch battery.
That makes me feel very happy. Maybe the water resistance is stronger than normal too.
 

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My 2006 MTG-900 just gave me the long beep of death they give when they can no longer hold a charge. :-(
 

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@yankeexpress,

That is an admirable collection. If anyone, then you must be in a good position to judge in what shape those rechargeable batteries are.

You wrote "going strong" and "still holding full charge". OK, I do understand that, but how would you say, is the remaining battery capacity compared to the new condition? Also how is reliability?
 

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This is a thread I started last year related this issue:

https://www.watchuseek.com/f17/gw-m5610-light-problem-5023707.html

The watch is still showing a high charge and exhibiting the same occasional problem.

It occurred to me that maybe the way a watch is used could have an impact on solar battery life.

The problem with mine occurred after I had been using it every day for four years straight including several times daily use of the EL, hourly chime etc, continually charging and draining. I guess most G's here are part of a collection and unlikely to see the same pattern of use, arguably equivalent to 8-10 years wear if worn 2-3 times per week and spending the rest of the time asleep in PS or perhaps sitting on a sunny window sill. I wonder if battery problems are seen more in watches in constant use?
 

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This is a thread I started last year related this issue:

https://www.watchuseek.com/f17/gw-m5610-light-problem-5023707.html

The watch is still showing a high charge and exhibiting the same occasional problem.

It occurred to me that maybe the way a watch is used could have an impact on solar battery life.

The problem with mine occurred after I had been using it every day for four years straight including several times daily use of the EL, hourly chime etc, continually charging and draining. I guess most G's here are part of a collection and unlikely to see the same pattern of use, arguably equivalent to 8-10 years wear if worn 2-3 times per week and spending the rest of the time asleep in PS or perhaps sitting on a sunny window sill. I wonder if battery problems are seen more in watches in constant use?
 
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