Every time I see a nice Accutron on eBay and think....yeah...I'll get that one....I read the description and it says "watch serviced and regulated to run on Accucell". I don't want to pay $35/year for watch that runs on $17 batteries that only last 6 months. I thought the great voltage debate was settled long ago and we (ie experts/RKIs like Rob B) have determined that you can regulate a 214 movement to run fine on 394/380 batteries with no risk to the movement.
Why can't the battery industry just make a battery the same size as the 394/380 that is 1.35V or a 387 size battery that is 1.35V.
If a watch is regulated to run on an Accucell and you drop in a 394, what would happen? Does the 214 have any tolerance or self regulating ability?