Quesiton about powering wristwatch

Can powering watch electronics (normally powered by a small 3V lithium battery) with a variable DC power supply (I'm using Tekpower HY1803D) might damage it? I'm trying to repair a very expensive gamma-detector wrist watch which I took apart., and I don't have a 2032 battery or battery holder to power it, so I wanted to use my variable powers supply that I use to power most of my projects... But those lithium batteries provide so little current, I have no idea if it matter what power supply I use...

Buy a battery...?

You can certainly power it from a variable voltage bench supply, but if you accidentally set the voltage to much above 3V, you will ruin the watch. Why not use two AA or AAA cells?

Thanks!

dc42:
You can certainly power it from a variable voltage bench supply, but if you accidentally set the voltage to much above 3V, you will ruin the watch. Why not use two AA or AAA cells?

Preferably used ones...

New AA/AAAs will put out over 1.6V each and you should probably be aiming around 2.6-2.8V.