Myota FS60

[Portcall]

Hi

I usually tinker with mechanical watches but a friend has given me his Citizen Edifice (Myota FS60 movement with AG1 cell) to look at for him. The battery when replaced will only last 2 weeks or so. Any suggestions on what it could be or am I better just putting in a new movement?

[watchweasol]

Hi I would not reccomend AG cells  some are ok but not all, first check the cell with a meter, If the voltage is below 1.3 / 1.4 it is us. I personally always fit Renata batteries but get them from a trusted source ie  Cousins.uk  as there are even fake batteries on the market

8299_Miyota FSXX Series Parts List.pdf

[jdm]

19 minutes ago, watchweasol said:

Hi I would not reccomend AG cells  some are ok but not all

Be aware, AG is not a brand just an old  denomination standard for Alkaline (1.5V) button batteries, as such these are never apt for watches (except some large Chinese quartz modules). For a quartz watch one should use SR (Silver Oxide) batteries with a 1.55V and longer lasting.

Since AG sizes are the same as some watch batteries, and they cost marginally less, sometime these are incorrectly fitted "in lieu". 

Below a shameless copy from the internet of AG sizes:

AG SERIES AND CORRESPONDING MODEL NUMBERS FOR EACH AG#

AG0 Button Batteries: 379, LR521, LR63, 618, GP379

AG1 Button Batteries: 364, LR621, LR60, D364, LR620, 280-34

AG2 Button Batteries: 396, 397, LR59, LR726, 612, 196, D396, D397

AG3 Button Batteries: 384, 392, 192, LR41, LR736, L736, GP192, V36A

AG4 Button Batteries: 376, 377, G4A, LR66, L626, LR626, GP77

AG5 Button Batteries: 393, 309, 193, LR754, LR48, D309, D393

AG6 Button Batteries: 370, 371, LR69, LR920, LR921, D370, D371

AG7 Button Batteries: 395, 399, LR926, LR927, LR57, D395, D399

AG8 Button Batteries: 381, 391, L1120, LR1120, L1121, LR1121, LR55, D381, D391

AG9 Button Batteries: 394, LR45, LR936, D394, GP394

AG10 Button Batteries: 389, 390, 189, L1130, LR1130, L1131, LR1131, LR54, D389, D390

AG11 Button Batteries: 361, 362, LR721, LR58, D361, D362

AG12 Button Batteries: 301, 386, L1142, LR1142, LR43, D301, D386

AG13 Button Batteries: 357, LR44, L1154, A76, PX76A, 303, D303, D357

[Portcall]

20 hours ago, jdm said:

Be aware, AG is not a brand just an old  denomination standard for Alkaline (1.5V) button batteries, as such these are never apt for watches (except some large Chinese quartz modules). For a quartz watch one should use SR (Silver Oxide) batteries with a 1.55V and longer lasting.

Since AG sizes are the same as some watch batteries, and they cost marginally less, sometime these are incorrectly fitted "in lieu". 

Below a shameless copy from the internet of AG sizes:

AG SERIES AND CORRESPONDING MODEL NUMBERS FOR EACH AG#

AG0 Button Batteries: 379, LR521, LR63, 618, GP379

AG1 Button Batteries: 364, LR621, LR60, D364, LR620, 280-34

AG2 Button Batteries: 396, 397, LR59, LR726, 612, 196, D396, D397

AG3 Button Batteries: 384, 392, 192, LR41, LR736, L736, GP192, V36A

AG4 Button Batteries: 376, 377, G4A, LR66, L626, LR626, GP77

AG5 Button Batteries: 393, 309, 193, LR754, LR48, D309, D393

AG6 Button Batteries: 370, 371, LR69, LR920, LR921, D370, D371

AG7 Button Batteries: 395, 399, LR926, LR927, LR57, D395, D399

AG8 Button Batteries: 381, 391, L1120, LR1120, L1121, LR1121, LR55, D381, D391

AG9 Button Batteries: 394, LR45, LR936, D394, GP394

AG10 Button Batteries: 389, 390, 189, L1130, LR1130, L1131, LR1131, LR54, D389, D390

AG11 Button Batteries: 361, 362, LR721, LR58, D361, D362

AG12 Button Batteries: 301, 386, L1142, LR1142, LR43, D301, D386

AG13 Button Batteries: 357, LR44, L1154, A76, PX76A, 303, D303, D357

This was very useful as I do not normally look at quartz watches, and my knowledge here is poor  thankyou very much 

[Portcall]

20 hours ago, watchweasol said:

Hi I would not reccomend AG cells  some are ok but not all, first check the cell with a meter, If the voltage is below 1.3 / 1.4 it is us. I personally always fit Renata batteries but get them from a trusted source ie  Cousins.uk  as there are even fake batteries on the market

8299_Miyota FSXX Series Parts List.pdf 236.35 kB · 1 download

Great thank you very much

[watchweasol]

Hi  If your Quartz knowledge is scant have a look at this document It covers both Mechanical and Quartz watches.

Witschi Training Course.pdf