Seiko Kinetic Capacitor 3023-5MZ

The Seiko 3023-5MZ is a genuine replacement capacitor (technically a rechargeable lithium-ion battery) used in many Seiko Kinetic watches. It consists of a Maxell TC920S cell with custom connector plates designed to fit specific Seiko movement calibers. It operates at 1.5V, with a diameter of 9.5 mm and height of 2.05 mm 1.It is compatible with a wide range of Seiko Kinetic calibers, including:5M22, 5M23, 5M25, 5M42, 5M43, 5M45, 5M475M54, 5M62, 5M63, 5M65, 5M82, 5M83, 5M84, 5M85 1✅ Pros:Genuine Seiko part – Ensures proper fit and function with supported calibers.Improves power reserve – Restores charging capability in older kinetic watches.Easy to find online – Available from specialty battery retailers and watch part suppliers.Includes connector plates – No soldering required for most installations.Cost-effective fix – Much cheaper than sending the watch in for full service.⚠️ Cons:Not universal – Only fits specific Seiko calibers; always check your watch’s movement number.Requires careful installation – May need a watch case opener and steady hands.Confusing naming – Sometimes listed under alternate part numbers like 3023-5MY or 3029-113 1.Not a true capacitor – Technically a rechargeable battery, which may degrade over time like any lithium-ion cell.🧾 Final Verdict:The Seiko 3023-5MZ is a trusted and effective replacement for many Seiko Kinetic watches suffering from poor charge retention. It’s a great DIY solution for restoring functionality, as long as you confirm compatibility with your watch’s movement. While not a universal fix, it’s a reliable part that can breathe new life into your timepiece.

I just bought a 1990's era Seiko Kinetic watch a couple of weeks ago, knowing in advance that it wasn't running. It's add copy didn't state there was any damage, but offered it for repair or parts. It appeared to be in beautiful condition, with a perfect dial face, perfect hands, and the matching titanium and gold colored bracelet. The bracelet showed no wear and even included a spare link to enlarge the bracelet if needed. I already have a Seiko automatic (5 series) and a Chinese knock-off, both automatic self-winding movements. What drew my attention to the Kinetic is the fact that this series of self-wind Seiko watches has an oscillating rotor, just like the other automatic mechanical movements, but instead of the rotor winding up a traditional main spring in a barrel, it turns a miniature "rotor and stator", like an alternator in a car. This little charging system charges a capacitor, which in this case looks like a typical watch button cell, but with small power-out and power-in lugs. The charged capacitor provides the electrical current to operate the watch's quartz time-keeping circuit and a stepper motor to move the watch's hands. This system combines the best of both worlds: A physical charging system powered by the movement of your arm/body, feeding a quartz watch circuit that keeps even better time than just about any mechanical watch movement! No batteries used or needed! I do watch repair so installing the replacement capacitor was very easy. But anyone can do this; all that's needed is a steady hand, a tiny regular tipped screwdriver and the capacitor kit. Although there is one thing some Seiko owners might need and not have and that depends of whether the last time the watch's screw-back case cover was removed and replaced, that it wasn't screwed back down so tightly that it can't easily be removed either by hand, a rubber ball case-back remover or careful "persuasion" with a piece of wood and a small mallet or hammer tool. It this is the case, a case-back removal tool will be needed. If you don't have one of these tools you can order one on line when the capacitor is ordered. The price for both is very likely to be less than any jeweler will charge to do this repair. As for the capacitor kit? Well, it was made by Seiko, fit perfectly and is working great!

How often does one take a watch apart, put it back together and it works? I replaced these parts in my kinetic Seiko and voila it works like brand new. These types of watches can be sent off for repair but that can be expensive. This is the perfect solution.

This capacitor was Dead On Arrival. The product clearly listed on Amazon site is Version MZ. What I got was the older and apparently expired version MY. Supplier is using Amazon to dump outdated product. Avoid this supplier. This is the third time I have changed this capacitor which is not easy.1/25 - So apparently this is a correct version. Other jewelers post say a newer version (3023.24T) is the latest. I used an intermittent watch winder that did not get me any where when charging. I then placed it on a Braun toothbrush charger that worked. I cant say the charge rate hurt the capacitor but it is well charged and working. I might suggest having a watch demagnetizer if you do use the toothbrush charger. My compass did not indicate magnetics but? I retract any negative supplier comments above. Product delivered on time.