What I do....
I gently rock the battery back and forth till it snaps off... Do this very carefully and avoid scratching the board. Then I get a cotton bud and clean the area with vinegar. Then I mix some Baking Soda [ Sodium bicarbonate ] and neutralise the area of vinegar. Then clean with water [ damp cotton bud ] and dry. Some folk use a hair dryer on a very mild setting... I don`t.
I have done this dozens and dozens of times.
scuzz