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7.0 Replacing the Batteries
The Powerware 9120 batteries are user-replaceable and can be replaced while the Powerware 9120 has
AC input applied and powers the loads. This means that, if necessary, you can replace the batteries while
the UPS is running. Before you replace the batteries, make sure that you read the safety information
below.
Note: If you have a power outage while you are replacing the batteries, the UPS will not be able to run
on battery power and your protected equipment will shut down.
CAUTION!
The batteries used in the UPS and battery pack can produce dangerous voltage and high
current. Therefore, the batteries may cause severe injury if their terminals contact a tool or the
UPS cabinet. Be very careful to avoid electrical shock and burns from contacting terminals
while you replace the batteries.
Batteries contain acids and toxic materials and can rupture or leak if mistreated. Remove rings
and metal wristwatches or other jewelry. Do not carry metal objects in your pockets: these
objects could fall into the UPS.
Never allow any tool to contact both a battery terminal and the UPS cabinet or another
battery terminal. Do not lay tools or metal parts on top of batteries.
To ensure continued superior performance of your UPS and to maintain proper charger
operation, you must replace the UPS batteries with the same number and type of batteries.
These batteries must be the same type as the original batteries: valve-regulated, low
maintenance. The replacement batteries should have the same voltage and ampere-hour rat-
ing as the original batteries.
Assume that old batteries are fully charged. Use the same precautions you would use when
handling a new battery. Do not short battery terminals with a cable or tool! Batteries contain
lead. Many areas have regulations about disposing of used batteries. Please dispose of old
batteries properly. DO NOT dispose of batteries in a fire because the batteries could explode.
Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It may
be toxic.
This equipment may produce ozone. Take precautions to ensure that the concentration of
ozone is limited to a safe value (0.1 ppm {0.2 mg / m} calculated as an 8-hour time-weighted
average).