GE 25942ge 5.8 cordless system batteries

The procedures to deregister are, of course, specific
to each make and model number of cordless phone.
All of them are a LOT more involved than simply
removing the battery.

For some AT&T, VTech, Uniden, & GE model numbers
you might try the following:
=====================================
For many AT&T models it is simple:
1. When the handset says "Connecting..."
enter *331734 [menu]
it will soon (chirp) and display "Not registered"
=====================================
For many VTech models it is a bit more involved:
1. Start by taking off the battery compartment cover.
2. press [menu]
3. scroll up/down to "Settings"
4. enter * 7 8 9 0 #
5. if display reads "Test Base",
scroll to "Test Handset", press [select]
scroll to "next page", press [select]
6. scroll to "Register Clear?", press [select]
7. display asks "Confirm?" or "Register Clear??",
press [select]
8. display reads "Ok" (chirps), press [ off ]

9. UNPLUG THE HANDSET BATTERY
(this is why the cover is off)
10. Wait ~30 seconds, re-connect the battery &
replace the cover
11. display reads "Not Registered"
=====================================
For many Uniden models:
1. Press and hold the [END] and [ # ] keys at the
same time, after a few seconds the display reads
2. "System Reset, Deregister Handset"
3. scroll to "... Base Unavailable"
press [SELECT]
4. Handset (chirps)
press [END]
5. display reads "Not Registered, Place in base..." =====================================
For some GE models:
1. press "program[mute]"
2. scroll to "Handset Setup" press "program[mute]"
3. scroll to "Deregistration" press "program[mute]"
4. scroll to "Yes" press "program[mute]"
5. display reads "Not Registered"

=====================================
Once you have the handset displaying "Not Registered"
you can follow the User's Manual instructions to register
the handset.

The model number for your cordless phone is shown on
a small sticker underneath the battery in the handset --
enter this number at www.manualslib.com to get a free
copy of the User's Manual if you need it.

Good luck!
------------

it's available here-
25982 Battery Replacement OEM Model 25982
2X Phone Battery for GE 25952 25982 25983 26977 27700GE2 27901 27907 27910...
1X3 2 3AF with Connector Replacement Battery
Fenzer Rechargeable Cordless Phone Battery for GE 25952 25982 25983... GE 25982EE2 Battery Replacements

Most likely the battery is done being a battery.
and will not hold a charge.

Goto the store (wal-mart) and purchase a new battery witch should be about $10.
Selvol

You have an (unfixable) LCD screen problem - the Liquid Crystal Display is dying (or broken by impact).
The best you can do (without a spare LCD screen and soldering/electronic repair skills) is hope that
there's a workaround that lets you use the phone without the LCD screen working.

Exploring a workaround: call the cordless from your cell phone, and see if you can answer by just using the keypad - if so, then the cordless works and it can be used until the whole phone dies (rather than just the LCD screen).
Most consumers just end up buying a new cordless about every year since these units take too much accidental abuse to last long.
If you decide to scrap the unit, save the battery for recycling at your nearest Home Depot.
They accept
old rechargeable batteries of any type - NiCad types used in cordless phones are especially toxic
(the (heavy metal) cadmium poisons spermatogenesis). Even better, save the battery for your
other GE 25932 5.8 GHz cordless phone - if you have a pair, then its mate's battery is old too.

you need a size 1/2AA battery TL-2150 made in israel (TADIRAN high energy lithium battery) 3.6 volts

Does the Phone Power Up?
1. When you pick up your GE cordless phone and press a button, the phone should beep as a confirmation that a button has been pressed. If the telephone handset does not beep, or if it does not respond to any buttons, the battery may be in need of a recharge. Verify that the cordless phone base unit is plugged in to an electrical source, then place the handset into the charging cradle. If no lights illuminate on the phone, or if charging fails to correct the issue, clean the metal charging contacts on the cordless handset and place the phone back on the charger. If it still fails to respond or to charge, the unit may need to be serviced or replaced.
Does the Battery Hold a Charge?
2. If the cordless phone charges up and appears to be ready for use but dies after only short periods of use, the internal rechargeable batteries may need to be replaced. Replacement batteries are widely available at electronics and discount retail stores. Note your phone's exact model number, as this number will be necessary when purchasing a replacement battery.
Listen for a Dial Tone
3. If the GE cordless phone powers on, and beeps when you press keys, but no dial tone is heard, one of three problems is the likely culprit. The phone's batteries may have an insufficient charge to fully power the phone, a condition that can be corrected by simply placing the phone back in the charger. If the batteries are charged, but no dial tone is heard, it is also possible that another telephone in your home or office is "off hook" or in use; verify that all telephones, fax machines and modems are securely on the hook. If there is still no dial tone, your telephone service may have been disconnected or require service by your local telephone company.
Listen for Static
4. On some GE cordless phone models, particularly older models, static may be heard if the radio signal between the handset and base unit experiences interference. Common sources of interference include unshielded electronics, appliances, and radio transmitters, as well as high-tension power lines. If your phone offers an option to change channels, try several different channels to see if the static is eliminated. If static continues to exist, or if static can be heard on wired phones sharing the same line, your telephone line may require service.
Verify Your Handset is Registered
5. Some models of GE cordless phones may display a message on the display screen that the handset needs to be registered. If this message appears, move the handset close to the base unit and press the "Prog/Mute" button near the bottom of the handset. Next, press the "Pager" button on the base unit (your handset may instruct you to perform this step). Finally, press the "Prog/Mute" button on the handset one more time to complete the registration process. Your GE cordless phone should now work correctly.The GE Cordless Phone brand is designed to deliver the conveniences of cordless home service with quality sound and features. There are many models of the GE Cordless Phone. The most current models, including the DECT 6.0, have standard features such as call waiting, caller ID, visual ring indicator, phone number memory and digital answering systems .
   
6. Before you use your GE Cordless Phone, ensure that you have all the parts. Your cordless phone package should include the phone base, a handset battery pack, a battery compartment cover, the cordless handset, a wall mount bracket, and a telephone line cord and AC power adaptor. Once you have confirmed that you have all of your parts, insert the handset battery pack into the handset and replace the battery compartment cover. Insert your telephone line cord and the AC power adapter into the phone base. The phone base identifies the telephone line as TEL LINE and the adapter as AC. Plug the phone base into the electrical socket. Place the cordless handset into the base. Allow the phone to charge for at least 16 hours before its first use. Failure to fully charge the battery before its first use will result in poor battery performance.
7. Once you have fully charged your phone, you can proceed with setting up your phone's features. If your cordless phone includes an answering system, complete this setup process first. Turn on the answering system by pressing the on/off button. The message indicator light will display. The cordless phones are defaulted to English as the selected language. To change your language preference, press the "Skip" button for two seconds. The language will change to Spanish. Next, you will set up your voice time and day stamp. While the answering system is on, press the "Answer" button on your handset for two seconds. The phone will enter the answerer mode. Press the "8" key. This will take you to the time/day setup menu. Use the number keys to set the hour and minutes. Use the volume up and down arrows to set the AM/PM. Press "#" to save. The cordless handset will also require that you give it a name. Press the "Mute" button for two seconds until the handset reads "ENTER NAME." Enter the name of the handset by using the touchtone keypad. Press the "Mute" button to save. Enter the default area code by pressing "Mute" until the phone displays "AREA CODE." Enter your three-digit area code and press the "Mute" button to save.
8. GE Cordless Phones are designed to be simple and convenient to use. To place or answer a call, press the TALK button. You can pre-dial a number by dialing the number before pressing the TALK button. When you are ready to make the call, press TALK and the phone will dial automatically. To answer a call that is waiting on the other line, press the FLASH button. If you experience call interference or bad reception while on a call, press the CHANNEL button until your line clears
9. 
   

Try Radio Shack or www.batteriesplus.com You're sure to find a replacement battery at one of those two places. Good luck.

I think its probably your only choice, NIMH batteries are known to have a very short shelf life if not regular charged / discharged you can get GE cordless batteries here - GE Cordless battery

Budget Batteries has them for $15.99.
http://www.budgetbatteries.com/ge-5-2762-and-5-2770-battery-cordless-phone-bb-044145.html

How to get the caller ID to work on the additional GE DECT phone handsets. You must follow these steps in the exact order :
#1 - unplug the base phone
#2 - unplug the telephone line from the base phone
#3 - remove the battery packs from the phones
#4 - wait 10 minutes. reverse the order when assembling. Put battery packs in phones, put the telephone line back in the base phone and lastly plug all phones back in.
It takes about another 10 minutes after that before all phone handsets start recognizing caller ID.