There are provided an electrode assembly, a battery cell including the electrode assembly, and a device including the electrode assembly. Power supply lines are electrically connected to CMOS inverters, and include lower layer interconnects and upper layer interconnect. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty. The delete marker may be stored as the latest object version of the user key, and may be addressable in the storage system using a composite key comprising the user key and the new version identifier.