Tripp-Lite SmartOnline SU12000RT4U Manuel Du Propriétaire page 6

Features
(continued)
External Battery Pack with Detachable Power Cable
This 4U external battery pack houses the UPS system's batteries. Multiple battery packs can be daisy-chained to increase available battery
backup runtime for connected equipment during power failures. Refer to the battery pack owner's manual for connection instructions and safety
warnings.
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External Battery Pack Connectors: Use these connectors to connect the battery pack to the power module and to daisy-chain
additional Tripp Lite external battery packs with the main external battery pack for extended runtime. (Daisy-chaining additional battery
packs is optional.) Remove the retention bracket(s) for access (the diagram shows the upper bracket removed). Check to ensure that the
external battery pack you are connecting matches the voltage listed next to the battery connector. Small sparks may result during battery
connection; this is normal. Do not connect or disconnect battery packs while the UPS is running on battery power (the "BATTERY"
LED will be lit on the control panel). Warning: Always use the connector retention brackets to secure the battery pack connection (see
the "Connection" section for instructions). Do not operate the UPS system without the connector retention brackets in place.
15 Battery Power Cable: Use this cable to connect the battery pack to the power module.
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