I have a vetch base of cs6619 and have ordered and received a new hand set Cs 6609 and can not get it registered although it has been charging foe 2 days. Please advise.

usually you can just put the new hand set on the main base station. Let it set for 20 minutes or until charged. It should read your other base at that time

Can you receive calls on that phone? If you can't then it might be set for the wrong channel. Try disconnecting the battery for 60 seconds and reconnecting.
If that doesn't work, the call/talk physical switch may have something spilled in it. You'll have to take the phone apart and clean the rubber switch contacts. Simple q-tip and rubbing alcohol to clean it up. (don't rub hard as the carbon contacts can be rubbed off)

Registering a Handset

If you see a "not registered" message on a handset, you must register it to a base before using it.

1. On the base, open the menu and select "Register Handset"

2. On the handset, press and hold POUND (#) until the handset display says "Handset Registering" (about 2 seconds).

3. Wait until the handset display says "Registration Complete" (about 30 seconds), then pick up the handset and press eND/CleaR.

# If you don't hear a dial tone or the display says "Registration Failed" charge the battery completely, then try again.

Robert, this info is out of the manual from link below courtesy of vtech Canada support.
If you subscribe to caller ID service, the day, month and time are set automatically with each incoming call. You can also set the date and time manually. Press MENU when the handset is not in use. Scroll to select >SETTINGS, then press SELECT. Scroll to select >SET DATE/TIME, then press SELECT. Use the dialing keys (0-9) to enter the month, date and year, then press SELECT. Use the dialing keys (0-9) to enter the hour and minute. Press or to choose AM or PM, or press 2 for AM or 7 for PM. Press select to save.

http://www.vtechcanada.com/support_docs/vtt/CS/CS6429_en_acib.pdf

This sounds like a registration problem, each 'old'
handset must be de-registered from its original
base and then registered to the 'new' base.

NOTE: the CS6229 handles a maximum of 5
handsets. If you have a handset displaying
"Handset #5" then you have a 'fully populated system'
even if you actually have only one or two handsets.

You will need to clear each handset ( I ) then clear
the base of all registrations ( II ) before re-registering
each handset ( III ) up to the maximum of five.
=====================================
( I ). First, to de-register a handset ---

0. Start by taking off the battery compartment cover.

1. press [menu]
2. scroll up/down to "Settings"
3. enter * 7 8 9 0 #
4. scroll down to "next page", press [select]
5. scroll down to "Register Clear?", press [select]
6. display asks "Confirm?" or "Register Clear??",
press [select]
7. display reads "Ok" and chirps, press [ off ]

8. UNPLUG THE HANDSET BATTERY
(this is why the cover was off)

9. Wait ~30 seconds, re-connect the battery &
replace the cover

10. display reads "Not Registered"
===============================

( II.) To clear the base of all handset registrations
( if needed, else skip ahead to ( III ). )

1. press [Find Handset] on the base and hold
past ~4 sec when the "In Use" lamp lights, at
about 10 secs the "In Use" lamp will begin to
blink. 2. release the [Find Handset] button momentarily,
then briefly press it again. After a moment,
all handsets that were registered to the base
(if any) will display "Not Registered" and be
ready for fresh registration ===============================

( III.) To register each handset to the base:

1. press [Find Handset] on the base and hold for
~4 sec until the "In Use" lamp lights.
2. press # on the handset and set the handset into
the handset cradle on the base
3. within 30 seconds or so, the handset will either
chirp and display "Handset Registered", then
"Handset #x" or it will say "Registration Failed".

NOTE: the battery must be well charged prior to the
registration process, a weak battery may cause a
"Registration Failed". Charge the battery for a
few hours and try the registration ( III ) again.

===============================
Good luck !!

The following is taken directly from the SSE37 owners' manual:

Registering a handset
If you see a "not registered" message on a handset,
you must register it to a base before using it.
1.
On the base, open the menu and select
Register Accy.
2.
On the handset, press and hold #/DND
until the handset display says
Handset Registering (about 2 seconds).
3.
Wait until the handset display says
Registration Complete (about 30 seconds),
then pick up the handset.
If you don't hear a dial tone or the display says
Registration Failed, charge the battery completely,
then try again.


Good luck!

This sounds like a registration problem, the
handset must be de-registered from wherever
it thinks it is and then registered to your base.

=====================================
( I ). First, to de-register a cs6114 handset ---

0. Start by taking off the battery compartment cover.

1. press [menu]
2. scroll up/down to "Settings"
3. enter * 7 8 9 0 #
4. scroll from "Test Base" to "Test Handset", press [select]
4. scroll down to "next page", press [select]
5. scroll down to "Register Clear?", press [select]
6. display asks "Confirm?" or "Register Clear??",
press [select]
7. display reads "Ok" and chirps, press [ off ]

8. UNPLUG THE HANDSET BATTERY
(this is why the cover was off)

9. Wait ~30 seconds, re-connect the battery &
replace the cover

10. display reads "Not Registered"
===============================

( III.) To register the cs6114 handset to the base:

1. press [Find Handset] on the base and hold for
~4 sec until the "In Use" lamp lights.
2. press # on the handset and set the handset into
the handset cradle on the base
3. within 30 seconds or so, the handset will either
chirp and display "Handset Registered", then
"Handset #x" or it will say "Registration Failed".

NOTE: the battery must be well charged prior to the
registration process, a weak battery may cause a
"Registration Failed". Charge the battery for a
few hours and try the registration ( III ) again.

NOTE 2: Some cs6114 bases do not have the "In Use"
lamp indicator. To register the handset simply park it
displaying "Not Registered" in the base cradle and wait
for the registration to occur. Pressing # as above may
be required, maybe not.
===============================
Good luck !!

To deregister the new handsets from their old bases and re-register
them to your base, try this for each new handset...

1. When the new handset says "Connecting..." and goes nowhere
else, enter *331734 [menu] and it will soon beep and display
"Not registered"

2. To register the new handset to your base: on the base press
the "Handset Locator" button and hold it until the "in use" light
comes on ( ~ 4 seconds ), then release the button and set the
new handset into the base phone cradle. After ~ 30 seconds
it will beep and display its "Handset #" (next in sequence).

3: Note: the base has a limit to how many handsets it can handle,
I believe it is five handsets maximum for the EL52300.

If your system was fully populated ( ie, a handset is already # 5 )
you will have to clear all the handsets from the base and
re-register them in sequence ( it is the only way to 'rescue' the
places occupied by the lost handsets ).

To clear the base of all registrations:

1. Press and hold the the "Handset Locator" button until the
"in use" light lights and then starts to blink ( ~ 10 seconds ),
release the button -- then press it again briefly while the "in use"
light is still blinking.

2. The base will beep and all handsets will display
"Not Registered"

3. Follow the instructions above for each handset in turn: press
"Handset Locator" ~ 4sec ( in-use light on ), set handset into
the base cradle, etc.

The manual is available from: www.manualslib.com
but does not describe these procedures.

Good luck !

• Your telephone can accommodate up to four cordless handsets. You can add new handsets (Model E560-2, sold separately) at any time, but each must be registered with the base before use.
• The handset provided with your telephone is automatically registered as Handset 1.
• Additional handsets will be assigned numbers in the order they are registered (2, 3 or 4). You can register a maximum of four handsets.

To de-register all handsets
• Unplug the power supply from the base unit.
• Remove all handsets from the charge cradles and base.
• Plug in the power supply while pressing and holding the HANDSET LOCATOR button.
• Continue pressing HANDSET LOCATOR until the IN USE and CHARGING indicators are lit (this could take up to 10 seconds).
• Release the HANDSET LOCATOR button.
• All handsets will display: ENTER BASE ID: XXXXXXXXXX
Once the base indicators turn off (up to 30 seconds), the handsets have been de-registered from the base, and can now be re-registered.

To re-register a handset:
• Make sure your handset batteries are properly installed and charged.
• Your handset will display "ENTER BASE ID".
• Enter the 15-digit Base ID number from the bottom of the base unit.
• Press SELECT to accept the new code and complete re-registration.

To re-register a handset to a new base unit:
• Make sure your handset batteries are properly installed and charged.
• Unplug the old base unit. Your handset will display "SEARCHING...".
• Install the new base unit by plugging it into an electrical outlet and phone jack.
• Press and hold the SELECT key until the handset displays "ENTER BASE ID".
• Enter the new 15-digit Base ID number from the bottom of the new base unit.
• Press SELECT to accept the new code and complete re-registration. The handset is now registered to the new base.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

possible that the new hand sets are not compatible with the base as it requires same hand sets as the base for the base to be able to register the handsets
follow the user manual to see if there is a how to register section that will help identify the problem