Answer to: Why isn't the battry working properly?Did you buy an OEM battery? That should be the ONLY battery you buy....one actually manufactured by Apple's supplier. Apple's OEM batteries have a safety chip in it that communicates proper functions and protections across the cells. Don't buy unknown batteries that risk damage to property and health.
Answer to: Does iMac accept 64GB of RAM?For those saying there is no need for 64gb, you are obviously not a composer or video editor. There are many media applications that use all 32GB of ram, forcing pro users to compensate with RAID 0 or SSD arrays.