Is this battery fit seiko model 5m42 og99

The only way to find out is to remove the back of the watch. I thought I had the right one. When I removed the back I found it was the wrong one. I had to order another with the number off the capacitor. This is for some Seiko watches. But to get the right one remove the back first and check the number. I have this capacitor which is of no use to me. When you have the back off the watch if it matches with the one you have it should be okay Michael.

Is this capacitor self charging?

The original Capacitor that came with my watch held charge for two weeks or longer when fully charged. The replacement Capacitor only holds charge for two or three days when fully charged. So I'm disappointed with the length of time of charge.

The correct part number for a 5M54 is 304324T I do not know if the one shown (30235MY) is a suitable substitute but I doubt it due to varying thickness of capacitors

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🔧 Power Up Your Timepiece with SEIKO's Best!

DURABLE DESIGN - Built to withstand the test of time, just like your style.
EASY INSTALLATION - Quick and hassle-free replacement for your convenience.
PRECISION PERFORMANCE - Engineered for accuracy, ensuring your watch runs flawlessly.
RELIABLE POWER SOURCE - Keep your timepiece ticking with the trusted MT920 battery.
UNMATCHED COMPATIBILITY - Seamlessly fits a wide range of SEIKO movements.

The Original SEIKO Capacitor 3023.5MY is a high-performance battery designed for various SEIKO watch movements, ensuring reliable power and precision. With its MT920 battery size, it offers unmatched compatibility and durability, making it an essential component for watch enthusiasts and professionals alike.

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