25 X Br2325 Panasonic 3 Volt Lithium Coin Cell Battery (Cr2325) : Health & Household - Amazon.com
3.0V battery - Lithium - Same as BR2325, CR2325, or equivalent - Not rechargeable - Mounts on the CPU drawer assembly motherboard - Mac Palace | Mac Parts Store
Amazon.com: Panasonic BR2325 3V Coin Lithium Battery (5Pcs per Pack) : Health & Household