Smart Power Systems Office-TBF UPS - Manual (Page 7)

RS232
Charging
This unit is shipped from the factory with its internal battery fully charged,
however, some charge may be lost during shipping and the battery
should be recharged prior to use. Plug the unit into an appropriate power
supply and allow the UPS to charge fully by leaving it plugged in for at
least 8-10 hours with no load (no electrical devices such as computers,
monitors, etc.) connected.
Computer Connection
Connect one computer-related device into one of the battery supplied
receptacles on the top of UPS. Office Series UPSs provide six
receptacles, three battery supplied receptacles and three surge
protected only receptacles.
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PC
REAR VIEW
OF400USB-OF600USB