CS5121 Telephone User's Manual
www.vtechphones.com
48
Problem Suggestion
The battery does not 
charge in the handset 
or the handset battery 
does not accept 
charge.
Make sure the handset is placed in the telephone base correctly. The handset  CHARGE light 
should be on.
Remove the battery from the handset and then re-install it in the handset. Put the handset 
back to the telephone base and charge for 16 hours. 
If the  handset is in the  telephone  base but  the handset  CHARGE  light  is  not  on, see The 
CHARGE light is off in this section.
It may be necessary to purchase a new battery. Please see the Battery section of this user’s 
manual (page 45).
The telephone might be malfunctioning. Please see the Warranty section of this user’s manual 
(page 58) for further instruction.
•
•
•
•
•
The  CHARGE  light  is 
off.
Clean the charging contacts on the handset(s) and telephone base each month using a pencil 
eraser or a dry non-abrasive fabric.
Make  sure  the  power  adapter  and  telephone  line  cords  are  plugged  in  correctly  and 
securely.
Unplug the power adapter. Wait for 15 seconds before plugging it back in. Allow up to one 
minute for the handset and telephone base to reset.
The telephone might be malfunctioning. Please see the Warranty section of this user’s manual 
(page 58) for further instruction.
•
•
•
•
Troubleshooting










