Seiko Sportura Kinetic SNL043 Watch Discussions | Drop

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Apr 8, 2015

Does this watch use batteries to run? Does is soley depend on the batteries or is the movement enough to support the watch?

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DeathWatch

380

Apr 8, 2015

YeHwanShinBattery.And the movement should be enough to support itself.Still i think you will need to replace the battery after some years due to its life cycle.But you should be able to get an new watch then.

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ChristopherJ

1189

Apr 8, 2015

YeHwanShinYup, the Kinetic movement is a Seiko proprietary movement which is a hybrid between automatic and quartz. (Other brands have automatic quartz movement, however none are still manufactured to my knowledge.) Much like an automatic, a rotor moves with the movement of your wrist. However, instead of charging a mainspring, it charges a rechargeable battery. Also, instead of the typical 40 hour power reserve, this has a 5 month power reserve. As a trade off, you lose the 21,600 bph but trade it for the accurate quartz tick.

DeathWatch

380

Apr 9, 2015

ChristopherJHi,i have found this from the manual: ● Full charge When the watch is fully charged, the watch will keep operating for approximately 5 months. The duration of charge decreases gradually over time. The extent of decrease, however, varies depending on the environment and condition of use.
So personally i think the battery still needs to be replaced.Like most rechargeable batteries do.

Hughs8

Apr 9, 2015

ChristopherJwill you be able to charge the watch like the seiko premier kinetic direct drive watch that was dropped earlier this month?

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ChristopherJ

1189

Apr 9, 2015

DeathWatchGood point, I misspoke. I have personally worn a kinetic for about 2 years and haven't noticed a decrease in the duration of charge, however that drop off happens after about 5+ years. (Some say that it drops to about 70% capacity.) Also, others have reported the need to replace their capacitor after about 10 years, which is quite a long time when compared to traditional quartz. Kinetic battery/capacitor technology had a much lower efficiency 10 years ago, but they have gotten a lot better in modern models.

ChristopherJ

1189

Apr 9, 2015

Hughs8Nope, the "direct drive" portion is referring to the ability to charge by hand winding. This is another level of complexity. The SNL043P2 featured in this drop is a Kinetic and it can only be charged through the automatic rotor.
One additional fun fact comparing traditional automatics and Kinetics - An automatic's mainspring is charged directly by the movement of the rotor. While the kinetic captures electricity by passing a magnetic field over the copper coils. By this definition, the winding is not a 1 to 1 ratio of efficiency. It's more about the speed at which the rotor moves over the coils, which is why kinetics don't charge well in a watch winder.

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