Looking for rechargeable battery for solar Seiko A156-503A

Hey everyone,

I own a Seiko A156-503A solar watch and I'm struggling to find a replacement for the original Maxell XR11630W (WSR265H) rechargeable battery. It seems like this battery has been discontinued and every supplier I found (like Small Battery Company or Flume Technik) lists it as out of stock or EOL.

Has anyone here recently found a source for this battery? Or maybe a safe alternative that works long-term without damaging the watch?

I’d be super thankful for any tips – maybe someone has leftover stock or knows a seller who still has one.

Cheers!