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Reliable sources for replacement battery/capacitors for Seiko kinetic's

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I've been snagging Seiko kinetics off the 'bay on the cheap which usually need a battery/capacitor replacement.

Typically I've bought them from Amazon, and yea verily that has already bitten me.

An Amazon procured battery that I put in a watch I bought about 18 months ago is already dead. Showing classic signs of being past it's useful life. 🤨

Best guess is the battery/capacitor was sitting on a shelf for who knows how long.

Any thoughts on sources for these things that I would have some sort of assurance they weren't older than the hills?

Thanks in advance,

Edited by Doobs
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I've sourced and replaced one for a friend, but I'm not a quartz guy. No idea how long it will last. It honestly didn't even occur to me that the supplier's stock might be old enough to reduce service life. It was genuine Seiko, and my mechanically oriented brain stopped there.

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One of the problems you're running into for the kinetics are The capacitor idea didn't work. Then the upgraded and replaced them with lithium batteries. They work much better they changed slightly how the watch works and lithium batteries have problems. he problem with lithium batteries are they do not like to be discharged to close to 0 V then their likelihood of recharging again becomes problematic. The problem with using them for watch batteries is eventually will discharge all by themselves and kinetic technology is relatively old so conceivably are purchasing old batteries.


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