StorageWorks HSZ20 Lithium and Lead Acid Battery Removal Instructions

This document provides detailed instructions for removing Lithium (NVRAM coin cell) and Lead Acid (cache) batteries from an HSZ20 storage system.

Key points include:

• Warning: Lead-acid batteries are high-energy devices; avoid contact between their tabs and conductive surfaces to prevent injury or equipment damage.
• Required Tools: Flat-head, Phillips-head, and #10 TORX-Head screwdrivers, plus side cutters.

• Removal Process Overview:

  1. Remove Controller from Subsystem: This involves powering off, disconnecting cords, removing the subsystem door and side cover, detaching angle brackets, and finally freeing and sliding out the controller.
  2. Remove Controller Cover: Screws (flat-head and pan) are removed, and the cover is slid forward to detach.
  3. Remove Batteries (Specific Steps):
     • Cache Battery (Lead Acid): Disengage its latching cable connector and slide it out of its tray.
     • NVRAM Coin Cell Battery (Lithium): Requires separating the top PCB from the controller, inverting the PCB, and then carefully cutting the battery's positive and negative leads with side cutters.

• Disposal: Batteries should be returned to a Digital Equipment Corporation Service Center or recycled at a local hazardous material disposal facility according to regulations.