reply to jack b
Re: Dumbest how to... The battery is probably spot-welded onto a board.
If it is a commercial battery, the number should be visible.
If you are comfortable working with circuit boards it is no big deal.
I replaced a phone cr2025 by simply cutting off the welded tabs.
A quick touch of solder and wire to make a replacement lead works fine.
A repair shop would likely replace the whole board $$$.
I checked it via the link. It is a regular button battery with tabs welded. Im going to crack it open this weekend.