Dell UPS 1920T - Manual (Page 52)

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UPS Maintenance
3 Unscrew the thumbscrew on the the metal battery cover and remove the cover (see Figure 25).
Figure 25. Removing the Battery Cover
4 Disconnect the internal battery connector (see Figure 26).
Figure 26. Disconnecting the Internal Battery Connector
5 Replace the metal battery cover.
Torque the screw to 0.7 Nm (6.2 lb in).
6 Replace the UPS front cover.