Talk:Automatic quartz

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The statement about energy accumulators typically having lifetimes comparable to batteries needs backing up with references. 05:48, 21 March 2006 (UTC)


Some SEIKO KINETIC made before year 2000 brought _faulty capacitors_ . Latest models already bring a new titanium lithium ion rechargeable battery.

CITIZEN Eco-Drive(solar powered) also brings a titanium lithium ion rechargeable battery like latest SEIKO KINETIC. And they said at http://www.citizenwatch.jp/faq/faq.htm

Q. What are the life spans of solar cells and secondary batteries? A. According to the experimental data, both will last more than 10 years.It is also considered to loose up to around 20 % of their initial capacities in 20 years, however, we speculate, that won't cause trouble for the use of the watch.

Also Citizen Watch Company, USA says at http://www.network54.com/Forum/78440/message/1080596766/ : "The manganese titanium lithuim ion rechargeable battery used in the Eco Drive watches have a life of about 40 years. Even after 20 years, they will maintain 80% of their capacity.

They are not affected by partial discharge and charge. They have a duty rate of 500 complete charges (completely depleted to full charge) so there is no need for worry at all about the life of the battery.

Sincerely Customer Service COA"


Manufacturers:

http://www.maxell.co.jp/e/products/industrial/battery/tc/index.html

http://www.panasonic.com/industrial/battery/oem/chem/lith/mangtit.htm


It's the other way around. What proof do you have that the rechargable battery will last 40 years? Show me this "experimental data." I've never heard of a battery lasting more than a few years. My lithium ions on my laptop, cameras, cellphones, etc. dies every few years and needs replacing.

I own a Seiko kinetic SKA192 and very happy with the quality (it's really beautiful) but let's not be a fanboy here. The rechargable battery will eventually need to be replaced just like any other device.


Links have been provided showing that the watches will last forever but where does the burden or proof lie? If we are looking for experimental evidence that might be very difficult because how can you prove experimentally that a watch lasts forever? You'd have to get watches and wait until the end of time to get the results.--Knowledge-is-power 10:13, 21 November 2006 (UTC)


Detailed explanation about lifetimes batteries at http://www.geocities.com/watch_crazy/ecodrive/ecodrive.htm --Sun Dec 10 20:33:22 CET 2006

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