Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell - Replaces Sony 364 (2 Batteries)

I purchased this 2 pack of Murata 364 silver oxide batteries to replace the power cell in my watch. Since Murata took over the Sony battery manufacturing line, these are the direct replacements for the original Sony 364 series and offer the same high standards of performance.Technical Performance AnalysisVoltage Stability: These cells maintain a consistent 1.55V output. This is critical for precision timekeeping in quartz movements where voltage drops can cause the watch to lose seconds over time.Leak Resistance: Silver oxide chemistry is superior to alkaline for watch applications because it is significantly more resistant to corrosion and leaking, protecting the internal movement of the timepiece.Shelf Life: The batteries arrived with a modern production date and a clear expiration window several years out, ensuring they retain their full charge while stored.Direct Compatibility: These were a perfect dimensional match for the SR621SW specification. They seated firmly into the battery clip without requiring any adjustment to the contacts.Maintenance RecommendationThis is an efficient and cost effective way to maintain your own watches without paying a jeweler a premium for a simple swap. Given that it is a 2 pack, it provides a ready spare for future maintenance or for a second timepiece using the same movement.ProsDirect replacement for Sony 364 and SR621SW cellsStable silver oxide chemistry for quartz precisionHigh capacity for long term operationConsPackaging is small and easy to misplace; store in a marked container

Good quality battery

Worked on the watch!

The Sony batteries was merged with Murata. I had a hard time finding the old Sony battery I had on my watch and I got to know they have changed the name. Great quality for sure

Checked voltage 1.6vWatch works great. Thought I'd give these murata batteries a chance because of their great reputation

ok

Their batteries, they worked.What more can I say

Works as promised. Fast delivery.