Question about Vtech IP5850 Cordless Phone

1 Answer

Phones going dead

We have had our phones about a year. Very recently they started displaying the message "warning! check batteries!" The manual said that means the batteries are either not there, or installed wrong. So I take them out and put them back in again, and the phone may or may not work for a few minutes, then becomes useless again. The message doesn't say anything about the batteries needing recharging, just to check them. The phones doesn't die quite as quickly in the base set as in the satellite base, but neither is dependable. Looking for replacement batteries on the vtech website, they don't even show replacement batteries for a 5850.

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Buy a new battery from ebay.
just type in the search box, 80-5808-00-00
(the battery number)
You should be able to get a replacement for around $6 incl shipping.
This worked for me anyway. (Same symptoms you described)

Posted on Jan 13, 2009


1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My ST01c unit is stuck on MANual and I can't get to the SETUP option.

The timer initializes in MANual mode.
To reach SET UP, press MODE button until set-up displays.
If MODE button does not work, then timer has a serious glitch.

1) If this is a timer that worked correctly before, and recently malfunctioned, then try replacing CR2 battery. The timer display and programming functions are dependent on the battery, so when battery starts going dead, the timer does odd things.

2) Try resetting timer.
Hold down ON-OFF button and then push reset button for two seconds.
Release Reset button, but keep holding ON-OFF button until display flashes INIT.
Then release ON-OFF button and 12:00 displays.
Following page has easy to follow programming steps:

3) ST01C has 1 year limited warranty, and people write in about defective timers each day.
There are no repair parts other than the battery.
Manual says when all other attempts fail, then reset timer as described above.

4) If this is new timer, then exchange defective timer for new timer.
I test timers: 4-6% arrive defective. Many go bad first year or two. Some last quite a while.
Some programmable timers can be reset and the timer recovers, as described above.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on timer.

Jan 05, 2011 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Possible battery going bad???

The signs of a bad battery are: going to static while talking on it, going dead after a short period of time, or needing constat charging.

Apr 13, 2009 | Panasonic KX-TGA552M Cordless Expansion...

2 Answers

What does a blinking "cl" mean?

I believe "CL"indicates clock. Change the clock settings at the lower right corner of the answering machine.

Apr 08, 2009 | Vtech 5.8 Ghz Handset Cordless Phone...

1 Answer

Phone goes to auto answer and I cannot get it out of that mode.


That message is displayed when the 2 aa batteries go dead on a partner ACS. The batteries are located on the "main" card on the bottom front below the plugs for the phones.It has a black slide bar that you push up to get the battery module out.Make sure you put the batteries in as shown on the module. Replace when finished. hope that helps.

Jan 15, 2009 | AT&T Lucent MLS-12D Phone

1 Answer

Radio problem with 98 Century.

diagrama electrico de las luces

Aug 06, 2008 | 1998 Buick Century

3 Answers

Invalid Battery Message

i dont know much about cell phones, but im gonna say that maybe you should try and get a new battery for it and see if that works

Jun 23, 2008 | Motorola Mobility RAZR V3m Cellular Phone

1 Answer

Cell Phone giving me a weird message...

take the phone to a mobile center and have it checked

Nov 22, 2007 | Samsung C417 Cellular Phone

1 Answer

Almost constantly gives "no link to base" message

I had this problem too. I popped the battery out, waited 1 minute then put it back in. Unfortunately this clears the memory of all recent calls, etc. but it immediately started working again. So far its only happened once...

Mar 26, 2007 | Panasonic KX-TG5422M Cordless Phone

Not finding what you are looking for?
Vtech IP5850 Cordless Phone Logo

316 people viewed this question

Ask a Question

Usually answered in minutes!

Top Vtech Lands Phones Experts

Cindy Wells

Level 3 Expert

5831 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers


Level 3 Expert

84540 Answers

Are you a Vtech Lands Phone Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides