The Museum of HP Calculators

HP Forum Archive 05

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41CV Batt Pack
Message #1 Posted by Rene Beltran on 9 Feb 2001, 12:47 a.m.

I have a 41CV in mint condition, but the battery pack (82120a) is dead! I do not have the Battery Holder. The Calculator do not turn on. Any solution is welcome :)

      
Re: 41CV Batt Pack
Message #2 Posted by Steve (Australia) on 9 Feb 2001, 6:33 a.m.,
in response to message #1 by Rene Beltran

It's totally dead, not worth a thing, send it to me!

Well, maybe not...

The cells can be replaced. The original 1/2 N cells are rare as hens teeth, but you can use 1/3 AAA cells.

1/3 AA *almost* fit, but require some truely extrodinary hacking to fit them (I would not advise it).

There is a problem with some nicad packs that will pass ummm well in excess of 12V to the calculator if the nicads are stuffed - so be careful trying to run it without the cells replaced.

I would suggest you fit the charger to the pack (outside the calculator) and measure the voltage. If it's less than 6V, then the calculator is almost certainly undamaged. If it exceeds 6V by much of a margin, there is a chance that your calculator may be damaged (sorry).

There is a "fix" to this problem that you can do when replacing the cells if your pack is one of these.

      
Re: 41CV Batt Pack
Message #3 Posted by Dave Hicks on 9 Feb 2001, 4:58 p.m.,
in response to message #1 by Rene Beltran

If you don't want to fix the rechargeable pack, I think I have a spare disposable holder that I could send to you.

Disposables are good if you're using just the basic calculator and ROM/RAM modules. They can get expensive if you're also powering the card reader or HP-IL.

            
Re: 41CV Batt Pack
Message #4 Posted by Rene Beltran on 9 Feb 2001, 5:56 p.m.,
in response to message #3 by Dave Hicks

Dave:

Thank you, that's the solution to my problem !

I sent you by e-mail my response.

Please let me know if you need more data.

Regards.

                  
Re: 41CV Batt Pack
Message #5 Posted by Dave Hicks on 9 Feb 2001, 8:26 p.m.,
in response to message #4 by Rene Beltran

Rene,

It will ship out tomorrow.

Dave

                        
Re: 41CV Batt Pack
Message #6 Posted by Rene Beltran on 17 Feb 2001, 3:52 p.m.,
in response to message #5 by Dave Hicks

Dave: I received the battery holder! Thank you for your support.

Please let me know in which way I can help the Museum.

Best Regards.

Rene Beltran


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