Uniden DSS3450 - Manual (Page 16)

[16]
Installing the Rechargeable Battery
Use only the Uniden BT-909 rechargeable battery
pack supplied with your cordless telephone.
Follow the steps below to install a battery.
1. Press in on the handset battery case cover (use the
finger indention for a better grip) and slide the cover
downward to remove.
2. Place the battery pack in the battery compartment
with the connectors on the battery and on the
compartment aligned
.
3. Place the battery case cover back on the handset
and slide it upwards until it clicks into place.