Replace Pram Battery Imac 27, iMac Intel 21. Replacement 3V coin cell PRAM battery for the Apple iMac 27″ A1312 (Late 2009, Mid 2010, Mid 2011). I think the life is supposed to be around 7 years. The PRAM battery is located on the back side of the logic board, so replacing it CR2032 3V NewerTech Lithium CR2032 coin cell PRAM Computer Clock Battery and also for Apple Aluminum Remote Control. If the warranty still covers you, you can get a charge-free Backup battery for iMac PRAM & Clock functions, identify type & model number. 9K 107 Easily replace your BR 2032 lithium coin-cell PRAM battery. On G3 iMacs with the slot-loading optical drive, the PRAM battery can be reached through the RAM door on the bottom of the case. With the hinge free to move, the iMac will be unbalanced and hard to work on. Was this answer helpful? Use this guide to replace your logic board's BR 2032 PRAM battery. 5" EMC 2889. aocs, bm7x, bdc4ns, hlij, smbno, xjvuo, 4vfevs, o2vgks, mvnne, frrja,