Question about Texas Instruments TI-89 Calculator

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Why is the battery life so short?

After replacing batteries, calculator will only run for an hour over a few days before it powers down. This is a new phenomenon, and I would like to get to the bottom of it.

Posted by rachel730 on


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Madisa Murray

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Maybe you batties are wek and maybe there is something again wrong with the calculator , or maybe you need stronger batteries have you tried that yet.

ps loved always

Posted on Jan 22, 2012


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Casio Classpad 330 batteries run out very easily.

This may or may not solve your problem but it might alleviate it. The calculator has a power saving mode which you can configure as follows.
Turn ClassPad ON
Tap the Menu icon at the bottom of the screen.
Scroll down until you see the System Icon
Tap the system icon. After a few moments the calculator comes back and displays the system configuration screen.
At the top of the system configuration screen tap the battery icon (look for a + - sign).
This opens the power saving properties.
The power Save Mode will turn power saving mode automatically, after a day, one week or one month. It can also turn the power Save Mode OFF.


The other configurable setting is the auto Power OFF. It turns the calculator OFF after 1 min, 3 min, 6 min or 60 minutes.

Note: another possibility is the use of rechargeable NiMH batteries. Be aware that some manufacturers discourage strongly the use of rechargeable batteries.

Hope it helps

Apr 25, 2012 | Casio ClassPad 300 Calculator

1 Answer

How do i check the battery life of the calculator?

The life of the batteries depend on the use. If calculator is on and running programs 24 hours a day, the batteries will not last more that 2 or 3 days. If you use it the calculator for 2 hours a day, fresh batteries may last a semester.
But I believe you want to check the CURRENT state of the batteries. You can buy from an electronic store or a dollar store a device that tells you if a battery is still good or not.
With the TI Connect software you can check battery status. See the screen capture that follows. To obtain the displayed window you must click the button DeviceInfo with calculator connected to the computer and TI Connect running.

Jul 17, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

Iturned on the calculator one day and it was very dim. A few dayds later, no read out


Batteries. Batteries. Batteries.

That is the description of what happens to TI Graphing Calculators when the battery power diminishes. The calculator will always reduce its display contrast in order to maximize time till expiration. There should have been prompts to warn you of its impending doom.

So, if it was very dim one day, and failed to display another day; then it most likely lost its battery power.


By the way, your calculator has lost all of its memory when it completely diminishes. So, if you want to avoid losing all of your content then I would suggest your replace the batteries before battery expiration.

Mar 13, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

Water got inside and is npt working now,.

Any amount of water that reaches the interior circuitry will cause an electronic shortage. Disassemble the back of the calculator and place it on a cotton towel with the open side down, then keep the calculator in a heated area for about 2-3 hours to attempt to dry the water out. Replace the battery and attempt to power-up the device. If you get no power, then it would be relatively cheaper to purchase a new calculator rather than take it to an electronic shop for diagnostic purposes.

Oct 24, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Change battery

For up to 1000 hours of operation, use Panasonic
LR-44, Ray-O-Vac RW-82, Union Carbide (Eveready) A-76, or equivalent battery types.
For up to 2500 hours of operation, use Mallory 10L14 or D357, Union Carbide (Eveready) 357, Panasonic WL-14, Toshiba G-13, Ray-O-Vac RW-42, or equivalent battery types.
1. Remove slide cover. Place calculator face down.
2. Using a small Phillips screwdriver, remove screws from back case.
3. Pull off back case.
4. Remove discharged batteries.
Caution: Avoid contact with other calculator
components while changing batteries.
5. Install new batteries positive side up, as shown on diagram inside case.
6. Replace back case, and then replace screws.
7. Press ' ! !.
Battery Information
The BA Real Estate calculator cannot hold data in
memory when the batteries are removed or become discharged.

Aug 18, 2010 | Texas Instruments BA Real Estate...

1 Answer

My calculator drains a set of four batteries with every use. Why?

I am not sure what every use means: duration, programs running etc. But that drainage is properly excessive. TI estimates that with 2 hours a day of usage, the batteries should last a school semester.

Possible causes of rapid drainage.
The most common causes of rapid battery drain are mismatched batteries
  1. Batteries of different brands
  2. Batteries of different types (alkaline (1.5V + rechargeable NiMH 1.2V)
  3. Batteries of different charge levels (new batteries with old ones)
  4. Negative charge build up
Another cause of rapid battery drain is the use of third-party programs: Certain of them keep large amounts of data in memory. Some of them are tweaked to bypass the TI power management scheme and disable the TI APD (automatic Power Down ) after 5 minutes of inactivity.

Possible remedies
  1. Remove all batteries (main batteries and backup battery)
  2. Leave them out of calculator for about 15 minutes. (Beware that this will clear the contents of the memory and that data will be lost along with all applications installed). However Applications cam always be reinstalled once calculator returns to its normal state.
  3. The possible benefit of the removal of all batteries is to make the negative charge build up disappear.
If that fails
If the foregoing steps fail to restore the calculator to its normal behavior, you may have to contact TI Customer Assistance by filling out and submitting a customer assistance form.

Dec 18, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Won't turn on. inserted new batteries, twice. still won't turn on.

Try taking out the backup battery located behind a little door with a screw right above the AAA batteries. You may need to leave all of the batteries out for a few hours then replace and try turning it on again. Another problem may be that the backup battery needs to be replace. Hope this helps.

Oct 02, 2009 | Texas Instruments TI-83 Plus Calculator

3 Answers

Son ran battery to zero after he broke power cord, now won't boot

Couple of things

First is to let it charge with the lid down for a few hours.
If that does not fix it then check that your son did not use the alternate display option FN F5 or FN F6 on the acers I think

If you still have no luck you might want to ask questions of your son before you take it to a repair shop

Aug 08, 2009 | Acer Aspire One PC Notebook

4 Answers

T.I 84 Plus Calculator

Well, this might not be right, but check the Brightness. Hit 2nd, then the down arrow. repeat this a few times. see if that works.

Sep 14, 2007 | Texas Instruments TI-84 Plus Calculator

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