Robsteriark
Favorite Answer
Old stock.
The battery was already old when you bought the watch. Or a very cheap low performance battery was fitted.
The other possibility is that the watch mechanism was a bit stiff to begin with, and that puts a lot more load on the old battery. If the next battery fails prematurely then the watch is definitely faulty and needs a repair or replacement under warranty.
spacemissing
That is actually quite common.
Cell life varies widely, too.
Many quartz watches are shipped running,
which depletes the cell.
My Seiko 5H23-8A09 was made a year and a half before I bought it
and was running when I first saw it in the jewellery store.
I can't remember how long the cell lasted after that,
but it was OK for a long time.