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LI 520 and LI 720
Make sure you have your unit’s model number and serial number. Then, call the nearest
office to order new batteries. Once you have the new batteries, follow the steps
below.
1. Turn the UPS on its side as shown. Make sure the arrow on the bottom panel is
pointing up.
2. Remove the screw (shown) from the bottom panel.
3. Once you have removed the screw, swing the panel out, away from the UPS.
CAUTION
1. The batteries used in the UPS and battery pack(s) 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.
2. Batteries contain caustic 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.
3. 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.
4. 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 rating
as the original batteries.
5. 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. For help, please call the nearest
office. 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.