OPTI-UPS ES550C User Manual page 27

Replacement Procedure for ES1000C, ES1500C
1. Remove the two screws from the bottom of the front panel. Gently slide the
front panel off.
2. Remove the battery retaining plate by loosening the three screws holding it
in place.
3. Gently pull out the battery.
4. Disconnect the two wires connecting the battery to the UPS.
5. Connect the wires to the new battery, making sure that the red wire is
connected to the red battery terminal and the black wire is connected to the
black battery terminal.
6. Push the new battery into place.
7. Reposition the battery retaining plate and tighten the three screws.
8. Slide the front panel back into place.
9. Tighten the two small screws on the bottom of the front panel.
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