Question about HP 19BII Calculator

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HP48SX Battery drain

I put new batteries in my HP48SX and it works fine. Come back to use it a few days later and the batteries are dead. I switch calculator off (it has auto switch off anyway) and the problem is the same.

HP customer services basically stated that they did not repair calculators out of warranty. I bought this in Seattle in 1993, so I guess the guarantee is expired!

Any advice would be much appreciated. I live in the UK.



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I suggest you use rechargeable batteries. They usually drain faster than the alcaline ones anyway.So have 2 sets of rechargeable batteries. Evaluate the number of days a set lasts. Insert the charged batteries before the old ones are thourougly drained.

The life of your batteries in the calculator depends on the usage.

About repairs: I am convinced that it will cost you more to have it fixed than to buy a new HP calculator (HP 49g*'s, HP 50g* 's).

Hope it helps.

Posted on Aug 28, 2009

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1 Answer

Dead Battery?

Take out the batteries. Also take out the backup battery. It is a button battery beneath the screw in the battery compartment. Check the button battery volts with a multi-meter. After 5 minutes put the button battery back in and then the fresh batteries. It might work now. Alternatively take out a battery, then hold the clear button and put the battery back in. Then try to turn on. If it still does not work take out a battery press the del button and put the battery back in.

Feb 06, 2014 | Texas Instruments TI-83 Plus Calculator

2 Answers

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

My ti-83 wont turn on. I changed all the batteries including the back up. Before i changed the back up i put in 4 new AAA batteries and then the screen went black. I tried adjusting the contrast but it...

I am sorry that I could not respond earlier. I am not sure of this but I think you can remove the back up battery and also the main battery, check the cells to see if there was a drain on the new cells , if so there is a short in the unit. If not keep aside for few hours and then replace the back up and then the main cells.
If there is no display there is some issue on the motherboard and might need a consensus.

Oct 26, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

I put new lithium triple aaa batteries in my TI-83. Nothing happened . days later it turned on worked for a little while then stopped. would it help to change the round lithium battery? Do you know what...

The button cell backup battery keeps the memory electrically refreshed when the calculator is turned OFF. The necessary power for regular use is supplied by the 4 AAA batteries (main power). That nothing happened when you put in a fresh set of (expensive) lithium batteries may be due to the screen being too dim to see anything.

If the calculator displays RAM CLEARED each time it is turned on, it may be due to a depleted backup battery. The battery model number is CR1616 or CR1620. On my TI84PLUS the backup battery is of type 303 (Sony) or SR44SW (Maxell).

Sep 05, 2010 | Texas Instruments TI-83 Plus Calculator

3 Answers


i had the same problem, so i took all of the batteries out (including the back-up battery) and then i hit the on button a few times. i then proceeded to reinstall all of the batteries, AAA first, and then the back-up battery after the calculator was already on. it works great now.

Jul 09, 2008 | Texas Instruments TI-83 Plus Calculator

2 Answers

Wont reinstall OS (error message during installation)

I had a very similar problem when trying to install the new OS. The way I got it working was

1. make sure you have fresh batteries in.
2. Find a new computer which you have not used neither TI connect nor the calculator on.
3. Download the OS to this computer from Ti´s webpage
4. Install Ti connect and the calculator on this machine 100 % correct! (check other help files for this)
5. Go into Ti connect, and it should find the calculator now.
6. Use the "device explorer" and then the "OS downloader" directing the downloader to the path where you have already downloaded the OS to the computer.

I hope this helps you out...

Apr 10, 2008 | Texas Instruments TI-84 Plus Calculator

1 Answer

Will not work

yes, you must switch the backup

Sep 17, 2007 | Texas Instruments TI-83 Plus Silver...

1 Answer

Batteries drains quickly

I had something similar, it kept saying "battery low" after putting in new batteries. Try the Clear method; Take out one battery, hold the Clear button, while holding it insert the battery again and press on, and release. Now press clear again, turn it off and turn it back on again. If that doesn't help... well it must be something else... sorry :S

May 30, 2007 | Texas Instruments TI-83 Plus Calculator

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