This is an old DW6900B 'Fox Fire' made in Japan.
The LCD was fading when I hit the illuminator button, so time for a new battery.
I bought this watch cheaply ( about $10 from China ) I put new resin on it.
Seems to have a cheap China battery inside, replacing it with some JDM Mitsubishi brand.
I bought a lot of these batteries when I saw them at a discount store. They still have this brand but it seems
Mitsibuishi have moved production to Indonesia now ( I notice Energizer also have done the same thing a few years ago too)
Hard to find Japan made batteries nowadays. ( I think Maxell is still made in Japan)
PS I like Japan made watches and batteries!
I use plastic tweezers to stop short-circuit out and avoid touching the batteries with your fingers .
AC reset with a unfolded paperclip
I use some silicon spray to relube the oring- this spray is supposed to be for rubber seals on airsoft gas guns. I assume it is fine.
Time to adjust the time.