HP Forum Archive 19

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Cheap Batteries for HP41CX Message #1 Posted by Prabhu Bhooplapur on 4 Feb 2009, 1:36 a.m. In the articles section I found an interesting topic on an alternate battery solution for the HP41C. It will be very helpful if Michael Harwood would upload the pictures and the procedure of implementing this solution. Thanks Michael. Prabhu Bhooplapur

Re: Cheap Batteries for HP41CX Message #2 Posted by Garth Wilson on 4 Feb 2009, 3:34 a.m., in response to message #1 by Prabhu Bhooplapur A couple of weeks ago I went into a Radio Shack to get batteries for my 41cx. I think they were $5 for a pair, but they were giving away a free package for every one you buy. I don't know if the sale is still on. I got a few years' worth of batteries for ten dollars.

Re: Cheap Batteries for HP41CX Message #3 Posted by Patrick Rendulic on 4 Feb 2009, 6:24 a.m., in response to message #2 by Garth Wilson I think that you have to find a good supplier. Europeans might look here: http://www.technikdirekt.de/main/en/foto/energie/batterien/386769/-/article-1-panasonic-lr-1-lady.html?t=1&language=en 1,61€ per piece. Is that OK?

Re: Cheap Batteries for HP41CX Message #4 Posted by ZOleg on 18 Feb 2009, 8:02 p.m., in response to message #1 by Prabhu Bhooplapur Quote: I found that the J size battery is a flat 6V battery and will fit into your HP-41CX. It is only $3.00 (in Canada) and a lot easier to find. It took a bit of fiddling with wires to get the + and - to the HP contacts, but now it works. I can upload a photo if anyone is interested to see how I did it. * Note: I had an extra battery holder which I used after I removed the dividing sections for the N batteries. To Michael Harwood Please post photo, manufacturer name and model of this batteries. May you sell one battery holder to me (i live in Russia)? How much cost with delivery? Thanks!

Re: Cheap Batteries for HP41CX Message #5 Posted by hpnut on 21 Feb 2009, 10:12 p.m., in response to message #4 by ZOleg Yes, I am interested to find an alternative to "N" sized cells used in the HP 41. I find that N cells are more difficult to get as the years go by. hpnut in Malaysia

Re: Cheap Batteries for HP41CX Message #6 Posted by Steve (Australia) on 22 Feb 2009, 1:07 a.m., in response to message #5 by hpnut Googling "6v J size battery" yielded this as the first hit: http://www.amazon.com/Rayovac-Alkaline-Photo-Battery-Size/dp/B00099YM1U It appears they may also be known as: 7k57, 539, 4018, KJ, or 4LR-61 As it says here: http://www.diversifiedbattery.com/4lr61panasonic.html Looks like camera shops are the places to hit! Thanks for the tip. I may try converting a battery holder to suit one of these.

Re: Cheap Batteries for HP41CX Message #7 Posted by ZOleg on 22 Feb 2009, 10:07 p.m., in response to message #6 by Steve (Australia) Thanks for help!!!

Re: Cheap Batteries for HP41CX Message #8 Posted by Karl Schneider on 23 Feb 2009, 4:47 a.m., in response to message #5 by hpnut Quote: Yes, I am interested to find an alternative to "N" sized cells used in the HP 41. I find that N cells are more difficult to get as the years go by. Perhaps it's different in Malaysia, but disposble alkaline "N" cells are not at all hard to find in the US for about $5 for a pack of 2. Rechargable "N" cells are not readily available in regular stores, but specialty stores and mail-order firms seem to have them, according to other posts. It still seems pointless to me for people to use rechargable cells in an HP-41, unless accessories that don't have their own power source (e.g, card reader, IR transmitter, HP-IL) are being used very heavily. It also seems that the "BATT" low-voltage warning would occur sooner. -- KS

Re: Cheap Batteries for HP41CX Message #9 Posted by db (martinez, ca.) on 22 Feb 2009, 3:15 p.m., in response to message #4 by ZOleg googling "nimh n cells" gives lots of mail/internet sources for n cells that will last for years at only 3 to 4 bucks each. why butcher a battery holder and mickey mouse the connectors when you can use what's intended?

Use N Cells! Message #10 Posted by Randy on 22 Feb 2009, 3:44 p.m., in response to message #9 by db (martinez, ca.) I second that DB, I really don't understand the "butcher" approach either. Every major manufacturer of alkalines still makes N cells. Eveready, Rayovac, Varta, Panasonic and Kodak are the first that come to mind. While they might be difficult to find in retail locations, they are certainly available through any good electronics/battery distribution channel.

Re: Use N Cells! Message #11 Posted by Michael de Estrada on 22 Feb 2009, 4:23 p.m., in response to message #10 by Randy Also Duracell makes them, which is a division of P&G Inc., a Canadian company. Curiously, I think the original poster was Canadian, and stated that N-cells were hard to find in Canada. The last time I checked, you could buy 4 N cells for an HP-41C for less than $10, including tax. I get over 5 years use in my 2 HP-41CV's, which admittedly I do not use very much anymore. Also, FWIW, the HP-28C/S use 3 N-cells. I buy mine at Batteries Plus Stores.

Re: Use N Cells! Message #12 Posted by Randy on 22 Feb 2009, 5:51 p.m., in response to message #11 by Michael de Estrada Some people seem to enjoy making simple things difficult... IMO it's one downside to having a creative mind :^)

Re: Use N Cells! Message #13 Posted by Forrest Switzer on 22 Feb 2009, 11:48 p.m., in response to message #12 by Randy This is just too good to pass up. Oh, the stories I could tell about Architects. (I am a Civil Engineer - licensed in California since the mid 70's) I was told once that when there is a problem - look to the simplest and most common answer first, then proceed to the more difficult and uncommon. It seems to me that the opposite method is used by many. Forrest

Re: Use N Cells! Message #14 Posted by Dusan Zivkovic on 23 Feb 2009, 2:55 a.m., in response to message #11 by Michael de Estrada I get Duracell N alkalines for my 41CV at local Waitrose supermarket here in London. They are a bit overpriced, just like everything else at Waitrose, but I would never imagine them to be hard to find...

NiMH N-Cells and Chargers Message #15 Posted by Dallas Osborne on 24 Feb 2009, 12:55 p.m., in response to message #10 by Randy Batteries: http://www.antonline.com/antonline.php?op=inventory&st=n+cell+mimio or http://www.provantage.com/mimio-850-0050~7VRTU02L.htm and Chargers: http://www.provantage.com/mimio-850-0047~7VRTU02N.htm or http://www.antonline.com/p_Virtual-Ink--850-0047--Mimio-Nimh-Battery-Charger-_474059.htm

Re: Cheap Batteries for HP41CX Message #16 Posted by Kevin Schoedel on 25 Feb 2009, 2:09 p.m., in response to message #9 by db (martinez, ca.) I bought a whole bunch of NiMH N cells, plus N-to-AA adaptors for charging, from the liquidation of Radio Shack's Canadian operations. Perhaps the US stores still carry them.

Cheap Batteries for anything in France Message #17 Posted by Patrice on 23 Feb 2009, 6:20 p.m., in response to message #4 by ZOleg Hello all, In France, I know a very good supplier for batteries with digressive price depending on quantities. Their job is mainly to sell batteries. It is called 'La boîte ā piles' in Reims. http://www.laboiteapiles.com/

Re: Cheap Batteries for anything in France Message #18 Posted by Stefan Hauschild on 24 Feb 2009, 2:03 p.m., in response to message #17 by Patrice In Germany it is Reichelt Elektronik (www.reichelt.de). One LR1 (also known as lady-cell or N-type battery) for 61 eurocents. Thatīs ok for me... -Stefan

Re: Cheap Batteries for anything in France Message #19 Posted by Peter A. Gebhardt on 24 Feb 2009, 5:22 p.m., in response to message #18 by Stefan Hauschild Stefan, How many LR1 do you order in one shipment? ;-) Motivated by your post, I gave it a look and was somewhat repelled by their minimimum order & charges ... (A problem which is inherent with most internet orders anyway). Best regards & Thx. anyway, Peter A. Gebhardt

Re: Cheap Batteries for anything in France Message #20 Posted by Stefan Hauschild on 25 Feb 2009, 2:36 a.m., in response to message #19 by Peter A. Gebhardt Peter, itīs worth the shipping fees if you order some parts, cables, semiconductors or anything else there. If I need only one or two cells I go to my local flea markets on sundays. The "turkish-battery-wholesale-companies" there sell the n-cell (new, of course) for 1 eur and the button cells for 50cents. -Stefan

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