Starting with the release numbers of the items listed below (can be checked on the label of the board) the mainboards will have new batteries without isolation strips (which had to initially be removed).

OCCM      ->    S30810-Q2959-X-7 and higher                             
OCCMR   ->    S30810-Q2959-Z-6 and higher             
OCCL       ->    S30810-Q2962-X-7