3
Battery installation and charging
Once you have installed the battery, the screen indicates the battery  
status. For best performance, keep the handset in the telephone base or 
charger when not in use. The battery is fully charged after 10 hours of 
continuous charging.
Step 1
Plug the battery 
connector securely 
into the socket inside 
the handset battery 
compartment, matching 
the color-coded label. 
Insert the supplied 
battery with the label 
THIS SIDE UP facing up 
as indicated.
Step 2
Align the cover flat 
against the battery 
compartment, then 
slide it upwards until 
it clicks into place.
NOTE: If you are on a phone call in low battery mode, you hear four short beeps  
every minute. 
Step 3
Charge the handset by placing it face forward in the 
telephone base or charger. The CHARGE light on the 
top of the handset is on during charging.
IMPORTANT INFORMATION
1.  Use only the supplied rechargeable battery or replacement battery (model BT166342). 
To order, visit our website at www.telephones.att.com or call   
1 (800) 222-3111. In Canada, dial 1 (866) 288-4268.
2.  If you do not use the handset for a long time, disconnect and remove the battery 
to prevent possible leakage.
After you install your telephone or power returns following a power outage, 
the handset will prompt you to set the date and time. To skip setting the date 
and time, press  OFF/CANCEL.
CHARGE light