Question about HP 32sII Calculator

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I need to rplace the battery for the calculator. Can you please tell me the type of battery i need to purchase.

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A76 or 357. They're the same thing under different names.

Posted on May 27, 2010


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Battery for Casio D-20M

Turn calculator over. Look for some small screws. Loosen them, remove the cover. Notice how the two batteries look when they are in place (polarity) and replace them. Close the cover and tighten the screws again. You need two LR 44 batteries or equivalent.

Feb 01, 2014 | Casio Office Equipment & Supplies

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How do I change out the batteries in my Sparco SPR02191 calculator

First a get cup or some sort of container to hold onto small parts.
Turn the calculator over on its back. You will need both a small phillips type screwdriver to remove the two small screws at the top. One that has been magnetized is best. Also you will need a small narrow bladed standard screwdriver to seperate the two halfs apart. Once you have removed the two screws and put them in a safe place it is time to open the case itself. Start near where one of the screws was and put the standard screwdriver in the groove between the halfs and gently start twisting it to pry the halfs apart. Work your way around the two halfs gently and slowly. There are plastic clips around the edge and they will slowly pop one after the other. Once you have the two halfs apart there is a small holder containing the battery. One side of the holder has a small gap. Slowly use your small standard screwdriver to push the battery gently though this gap from the far side. Mine had a GP189 button cell. You can go online and google 'GP189' and look for other rbatteries of this type. Same thing for putting the replacement battery back in. Just get it started with your fingers and push it in with the small standard screwdriver. If you don't have a small standard screwdriver a small dinner knife can be used to pry the halfs apart and anything small like that can be used to get the batteries in and out. Anything small of metal or bamboo comes to mind. As far as getting a new battery on the cheap try looking in 'Dollar Tree' type stores. If they don't sale the batteries themselves you can purchase a small generic calculator or any other small electronic and rob the battery from it. That's what I basically did in looking at other small calculators I already owned and robbing a battery from one of those. The very last step I took just before putting the calculator back together is noting the battery type and position and marking that on the back of the case with a fine tip sharpie.

Jun 20, 2011 | Sparco Products SPR02191 Calculator

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How can i change the contrast of the display?

Hi ik12364,

The Hp 10s doesn't have contrast control. You probably need to change the button cell battery LR44. This battery only last 3 years, if your lucky under normal use. No telling how long it sat in a warehouse or, on the shelf. If replacing the battery does not work then you may have a defective screen. HP should replace it, if you had it less than a year of purchase date. If you have any more questions about this calculator just post a comment about your inquiry and, I'll be glad to respond.

Jan 13, 2011 | HP 10s Scientific Calculator

1 Answer

I just purchased an it-84 calculator and I am not able to open the battery cover to insert the batteries that came with the calculator. Please give specific instructions to solve this...

The latch on the battery door is on the back of the calculator, near the center.
Holding the calculator, looking at the back, with the wider (top) of the calculator pointing away from you, put your index finger into the indentation and gently press the latch towards the bottom of the calculator while lifting the door up.

Dec 29, 2010 | Texas Instruments TI-84 Plus Calculator

2 Answers

My ti 83 plus said that my battery life was low to change them. so i put 4 new batteries in and now it will not turn on at all.

TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

If that doesn't do it, please add a comment to this post and we'll go on from there.

Sep 09, 2010 | Texas Instruments TI-83 Plus Calculator

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I just purchased my TI-84 Plus Silver Edition calculator. Looking through the booklet it does not tell how/where to install the batteries. Can you tell me where the batteries go?thank you p.r. Pease

Put the slide cover on the face of the calculator to prevent pushing buttons inadvertently.<br />Turn calculator to have its back towards you.<br />From about the middle of the length of the calculator to the bottom, there is a rectangle rounded at the bottom. That is the battery compartment cover.<br />Atop the rectangle there is a latch about 2 cm long. Gently, with one finger, push the latch downwards and pull towards you ll the latch downwar<br /> <!-- from fixya rte -->

Jul 16, 2010 | Texas Instruments TI-84 Plus Calculator

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My Ti-84 recently stopped working. I tried using

Let us start with the easy stuff:
  1. The warranty is for one year in the US and Canada. The length my differ in other poarts of the world. Check the documentation that shipped with your calculator.
  2. If you want to have it repaired, you can contact the TI customer care services: email them at, they should be able to tell you where to send it, take it, and much it should cost you.
  3. The lowest retail price for the calculator in Canada is 130 $CAN.
  4. No, I cannot tell you if this mulfunction is common with this type of calculators.
  5. To tell you the truth I am not even convinced (without proper diagnostics) that the calculator is malfuctioning. Call me a doubting Thomas.
The fisrt diganostics you should perform are:
  1. Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
  2. After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculkator is doing after you press a key.
  3. So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
  4. A third easy measure is to use the TIConnect software (available on to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.
Here are some more procedures to perform in the order they are presented. Please read the post till the end.

  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. While holding [CLEAR], reinsert the AAA battery and then
  4. turn the calculator on.
  5. The calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary. (see above)

This step requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from You must have the TI USB SilverLink or the TI Black serial cable ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. While holding [DEL], reinsert the AAA battery and then
  4. turn the calculator on.
  5. The calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI Connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OS Downloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
If the message "Error! Press any key to turn unit off. Then turn unit back on." appears on the graphing calculator, quickly, remove one battery from the calculator and reinstall it while the transfer is taking place.

You have several ways to connect the calculator
  • Serial Black cable that used to ship with the TI 83 Plus. It connects to a serial port on a computer and to the I/O port on the calculator. It requires the Graph Link software available on the TI web site (Downloads, Software and Apps, Connectivity)
  • USB Silver Link cable. It connects a USB port on the computer to the the I/O port on the calculator. It requires the TI connectivity software, also available on the TI Web site.
  • A USB mini A to mini B cable to connect two units.
  • An I/O cable to connect two calculators through their I/O ports.

Feb 13, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

2004 Nissan maxima Keyless Remote doesn't work to unlock / lock the doors

your battery is probably dead. Take the remote to Orielly auto parts and they have a tester that will tell you if the battery is dead. If the other buttons work on the remote then the remote itself is the problem and will need rplaced.

Nov 16, 2009 | 2004 Nissan Maxima

1 Answer

HP 28C Scientific Calculator

It takes three N cells, 1.5 volts each.

Dec 07, 2008 | HP Office Equipment & Supplies

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