Tripp Lite SmartOnline SU2000RTXLCD2U Owner's Manual page 29

Internal Battery Replacement
5
Remove the batteries completely using the pull-tab.
6
Insert the new battery set into the UPS in the same position as
the original set. Reconnect the red and black cords to the new
battery set.
7
Replace the metal plate.
8
Re-attach the LCD screen connector on the front panel.
Replace the 6 front screws to secure the front panel.
5
6
7
8
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