3Install the handset battery.
Use only AT&T Battery 3301,SKU# 91076.
a)Remove battery compartment cover by pressing on indentation and sliding downward.
b)Plug the battery pack connector into handset. Place the battery pack and wires in the compartment.
c)Replace cover by sliding it on its track up over battery case until it snaps firmly into place.
4Charge the handset battery.
•Place the handset in the base.
•Charge the battery for at least 12 hours. After the first charge,the battery will charge in eight hours.
5Check for dial tone.
•After the batteries are charged, lift the handset and press 
; you should hear a dial tone.
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