Question about HP 12c Calculator

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What battery do I use in an older model HP 12C? The battery in the calculator is model 357...can't find.

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The more common name for the 357 is SR44. Other common names you might see are LR44, A76, and S76, depending on the manufacturer. Any of those will work.

Posted on Sep 09, 2010

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1 Answer

How to fix my hp calculator 12c numbers display is faint?


There is no contrast adjustment possible with the 12c. Most of the time, faint displays are due to weak batteries or poor contact with the battery or batteries.

Jun 26, 2014 | HP 12c Calculator

1 Answer

I have an old 12C HP calculator that uses 3 button batteries. Who sells these in Sydney ?


LR44 or equivalent batteries should be available at just about any electronics store. There are about a dozen Sydneys in the world, is there a Radio Shack store nearby?

Jul 24, 2011 | HP 12c Calculator

1 Answer

Do you have advice in calculator choice between HP 12 c and the TI BA II Plus Professional Financial Calculator? Assuming that I get proficient with RPN (which I'm learning now); is one faster than the...


The 12C is more expensive and more powerful than the BAII+Pro. The HP is also programmable, which the TI isn't. Starting from scratch (assuming you've never used a calculator before---a somewhat unreasonable assumption) the TI might be easier to learn, at least initially. But after a certain point, the HP will leave the TI behind. The HP is faster and more capable.

There are at least three different versions of the 12C available. There's the original 12C, the 12C Platinum, and the current 12C. The only way to tell the difference between the two non-Platinums is to look at the battery compartment---the original uses three button cells while the newer uses two coin cells. The newer one is MUCH faster. The Platinum, however, can use RPN or algebraic.

Unless your choice is limited to the 12C or the BAII (by the requirement of an exam, perhaps), you might want to look at the HP 20B and the HP 30B. Programmability aside, they're even more powerful and easier to use and faster than the 12C, and the 30B is also programmable.

There are other considerations, of course. Factors such as the feel of the keyboard, the 12C's landscape orientation as opposed to the others' portrait orientation, etc, are all matters of personal preference.

Disclaimer: I own multiple HP and multiple TI calculators. I tend to use HP calculators for calculating, while I use TI calculators to answer questions here at FixYa.

Mar 23, 2011 | HP 12c Calculator

1 Answer

I have an HP 12c. I replaced the battery (CR2032) and the unit will not turn on.


Try to flip the battery, if it does not work, pull the battery out and wait for 10 minutes. After that, put the battery in again.

Feb 28, 2011 | HP 12c Calculator

1 Answer

I am currently studying for the CFA Level I exam, during which only two calculators can be used: the TI BA Plus II and the HP 12C (or 12C Platinum. I've decided that I want to go with the HP 12C for a...


Personally, I'd go with the regular, or the Plus, staying away from the Platinum. There's nothing on the calculator or package to distinguish the Plus from the regular, but the Plus uses two coin batteries while the regular uses three button batteries. The Plus is just like the regular, except a LOT faster.

Dec 31, 2010 | HP 12c Calculator

1 Answer

How can i tell the difference b/w hp12c and hp12p. i bought a hp12p from ebay(it's a stupid decision, I know!) and when i solving for IRR, i felt its running quite slow. I think the guy sold me the hp12P...


I couldn't find any reference to a HP calculator model 12p.
There is a HP 12c financial calculator and a 12c Platinum financial calculator.
Check both models (for images, specifications, functions, user guides, etc.) :
HP 12c Financial Calculator
HP 12c Platinum Financial Calculator

Aug 06, 2009 | HP 12c Calculator

1 Answer

HP 12C -- Rad error


Hello,
Here is the self-test procedure for your calculator. If it does not answer as it should, it may need service. Sorry, I resized the picture but FixYa refuses the new dimensions. Hope it helps.

638017f.jpg

Jun 09, 2009 | HP 12c Calculator

1 Answer

My HP 12C will not turn on even after changing the battery


Check to see that the batteries are in correctly and that the contacts are clean. If not, it may be time for a new one.

Mar 30, 2009 | HP 12c Calculator

1 Answer

Changed batteries, zeros are in display but no key response


Perhaps a the connections are dirty (battery connections) or you may have the wrong battery type/model

Feb 11, 2009 | HP 12c Calculator

1 Answer

HP 12C


IF I REMEMBER THIS IS A PROGRAMABLE CALCULATOR RIGHT, YES IF IT IS PROGRAMABLE, NOW YOU HAVE AN ANSWER TO THE MILLION DOLLAR QUESTION HOW TO DO IT MY BE ON THE INSIDE OF THE COVER OF THE DUST COVER .

HP MAYBE ABLE TO FIND SOMEONE TO HELP YOU.

HP FORUM CHAT LINE, HELP LINE, USER GROUP, OLD COMPUTER CLUB, FRIENDS WORK AROUND ENGINEERS MY HAVE THE KNOWLEDGE, OLDER CLIENT TELL.

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Jan 26, 2009 | HP 12c Calculator

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