Metro Mobile Computing Workstations MPS-3111 Series Sealed Lead Acid Power Supply - Manual (Page 21)

Metro TM MPS-3111 Series SLA Power Supply Operations Manual Supplement, Doc. No. L01-506 21
InterMetro Industries Corporation
Warning: Risk of Electric Shock
The AC power cord is the only means to disconnect the MPS-3111 Series
SLA Power Supply from the AC power grid (mains). The ON/Extended
Storage Switch on the power supply does not disconnect from main
power.
On the other side, the power supply employs a sealed lead acid battery to
provide mobile DC output power. Low voltage (10-16 VDC) DC power is
available from the power supply, even when the AC cord is disconnected
from an AC outlet. To remove DC power, put the ON/Extended Storage
Switch in the Extended Storage (OFF) position and unplug the power
supply from the AC outlet.