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4.2.4 Battery Safety Precautions
Servicing of batteries should be performed or supervised by personnel experienced with batteries and
the required precautions. Keep unauthorized personnel away from batteries.
When replacing batteries, use the same number and type of batteries.
Regular maintenance of the battery module is an absolute necessity. Periodic inspections of battery
and terminal voltages, specific gravity, and connection resistance should be made. Strictly follow the
procedures outlined in the battery manufacturer's manual. (See battery manufacturer’s web site.)
Valve-regulated lead-acid batteries do require periodic maintenance. Although they do not require
maintenance of electrolyte levels, visual inspections and checks of battery voltage and connection
resistance should be made.
Since individual battery characteristics are not identical and may change over time, the UPS module
is equipped with circuitry to equalize battery cell voltages. This circuit temporarily increases charg-
ing voltage to maintain flooded type battery cells at full capacity.
!
WARNING
Lead-acid batteries contain hazardous materials. Batteries must be handled, transported,
and recycled or discarded in accordance with federal, state, and local regulations. Because
lead is a toxic substance, lead-acid batteries should be recycled rather than discarded.
Do not dispose of battery or batteries in a fire. The battery may explode.
Do not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin
and eyes. It may be toxic.
A battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine if battery is inadvertently grounded. If inadvertently grounded, remove source
of ground. Contact with any part of a grounded battery can result in electrical shock. The
likelihood of such shock will be reduced if such grounds are removed during installation
and maintenance.
• Lead-acid batteries can present a risk of fire because they generate hydrogen gas. In addi-
tion, the electrical connections must be protected against accidental short circuits which
can cause sparks. The following procedures should be followed:
• DO NOT SMOKE when near batteries.
• DO NOT cause flame or spark in battery area.
• Discharge static electricity from body before touching batteries by first touching a grounded
metal surface.
• After replacing battery jars in a battery cabinet, replace the retaining straps that hold the
jars in place on the shelves. This will limit accidental movement of the jars and connectors
should the cabinet ever need to be repositioned or relocated.
NOTE
Do not use cleaners on the batteries. Solvents can make the battery cases brittle. Use only a dry
cloth or a cloth moistened in water
NOTE
Do not use equalize charging with valve-regulated lead-acid batteries, such as those used in
Liebert Battery Cabinets.
Consult the battery manufacturer's manual for specific information about equalize charging.