Hp 41c battery (For the HP-41C. $39. A 12 euros environ les 4 piles, le total semble une assez bonne affaire. (09-23-2014 01:10 PM) Eddie W. The program was simply STO c. 00 € IIRC HP-41C includes a diode in the CPU board to prevent damage to circuits due to errors in battery polarity. Durable Design: Professionally 3D printed in Nylon for a strong and lightweight construction. g. About the 5Vcc, the HP41 works with 5Vcc somehow because you can use four N-size rechargeable batteries (aprox. Sort by: Spacer set for repairing old HP41c. by hpbrian » Mon Sep 23, 2013 4:54 am . The configuration of the HP-41C is very much like a computer system. Mar 6, 2025 · This is a very well done 3D printed battery pack for my HP 41C. C. All LED calculators and the HP-41 series are supplied by rechargeable battery packs. Re: Replacement battery for HP-41C rechargeable pack Message #2 Posted by Ron Meek on 11 July 2002, 1:29 p. Jun 2, 2010 · Par exemple ici à 28 euros avec le port : NEW BATTERY CASE HP 41C HP 41CV HP 41CX CALCULATORS. Peel up the feet and remove the screws. Does the adapter provide enough current to run the card reader? May 6, 2009 · I realized that this spring is very (VERY!) close to the gold plated traces on the underside of the P. 650 FF, HP-41CV : Prix à l May 16, 2005 · HP Xpander Battery Compartment / Changing, Eric 6 responses; New HP49g+ ROM operating system!!!!!, Boco 2 responses; 48SX ON/OFF button, Seb 3 responses; hp 41c battery pack replacement, Russ Henderson 9 responses; Finding RPN Calulators example program!, peter 2 responses; HP 19B not working, GChu 0 responses (09-23-2014 01:10 PM) Eddie W. Hi. Battery Pack HP 41C/CV/CX Calculator Replace 82120A with Alkaline N-cells. Send to HP to get it repaired. Sep 23, 2013 · All about the HP-41C caclulators. Hello, Hopefully Dec 14, 2020 · hi bas, i have currently two working prototypes on my bench. Requirements: A small size screw driver Aluminium for connecting the batteries Two wires for minus / plus connectors Cohesive scotch Page 2 The HP 41C calculator not working anymore Page 3 The broken strip (battery corrosion HP made the battery contacts out of thin copper foil stretched over formed hard plastic. (09-23-2014 01:54 PM) ElectroDuende Wrote: (09-23-2014 01:10 PM) Eddie W. It is a programmable scientific calculator that offers a wide range of mathematical functions and capabilities. 1 Answer stopped working after wrong battery installed. Shore Wrote: Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart? The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the leak. Extended use charger 92266A. It's black but still looks great when installed. , attaching leads to solar cells and fixing rear window defroster contacts), but never for a contact that's likely to see some wear and tear. imho, of course. Today I decided to open it up and discovered the blue crud. BAT - Annunciator support: Indication of near empty battery is working. Please choose option! New  price: cheaper circuit translating to 10% lower price! Battery-back Jun 30, 2021 · All about the HP-41C caclulators. I finally found some batteries for it (N size) and live video'd the powerin Re: HP-41C* Halfnut vs Fullnut Message #2 Posted by jbssm on 19 July 2006, 4:31 p. The battery voltage won't be added to the USB voltage, but you definitely don't want the USB to charge alkaline batteries Re: HP-41C: +3V inner battery contact Message #3 Posted by Luiz C. It provides 5 volts via 4 2/3C NiCds. Save PDF. HHC 2023, October 7-8, 2023, Orlando, Florida: Sylvain Côté presents "82120D Rechargeable Battery Pack for HP-41C", describing Diego Díaz's lithium ion batte HP Calculator Literature Aug 26, 2022 · All about the HP-41C caclulators. , in response to message #2 by Raymond Del Tondo. Featuring a compact and portable design, the HP 41c offers flexibility and convenience for users on the go. 8Vcc nominal). $5. On my 17 yr old CX, the flex circuit which makes up the battery contacts and module port contacts had problems at the area that makes contact with the main circuit board. Mar 6, 2025 · (Fits HP-95, HP-97 and 41C Printer. , in response to message #1 by Erik Wahlin. I hope I can repair it. , in response to message #1 by AlbertTocarLoseggs. Shop AAA, coin cell and more batteries to get high-performance power for your device. Das erste Modell der 41er-Serie kam 1979 auf den Markt (09-23-2014, 01:10 PM) Eddie W. Upon opening it, it turned out that the battery contacts were corroded. It is actually mentioned in step 10 in this book too. Apr 9, 2023 · this is coming from a new member and absolute HP-41C beginner, so please forgive me for any stupid questions / wrong jargon, etc. Hi Erik, Good idea! I've used the same stuff for several difficult to repair electrical contacts (e. Eddie W. Our replacement Calculator Batteries deliver longer, more dependable run time and meet or exceed all OEM specifications. The only external power solution HP offered was the 82120A rechargeable pack, which would accept an 82059A charger (or the equivalent for other regions). Free download of a black-and-white scan of the English-language book 'HP-41C/CV/CX Service Manual' by Hewlett-Packard, which is an advanced user's guide or advanced user's reference for the HP-41C, HP-41CV and HP-41CX calculators. The calculator was in a drawer for 15+ years and would not turn on. The terminals in the battery compartment are clean and uncorroded, and there are no rattling sounds from within the case. Please look to the attached manual. Later on, HP switched to a battery holder that uses the N alkaline batteries. The HP-41CV does not use any memory modules. m. (60+ HP-41 links on the links page, This calculator has been sitting in my cupboard for well over 15 years unused. My original intention was to buy a 29C but was blown away with this LCD, alphanumeric, expandable portable computer. 2) Battery use and calculator care instructions. I used to have a card with an autoexecute program on it. Jan 23, 2017 · I've just received an HP-41CV and a few modules, for the cost of shipping. New Listing Hewlett Packard HP 82120A Rechargable Battery Pack for HP-41C - Manual ONLY. 055 FF puis 1. It is made of a flexible circuit, already collated to an 3D-printed battery-expansion ports module, ready for assembly within your HP41c . After eBay came into being, I got a double extended memory module, and battery life dropped to six months. Shore Senior Member: Posts: 1,621 Joined: Dec 2013 HP 41C Battery Contacts (Cleaning?) Hewlett Packard HP Battery Holder for HP-41C 41CV 41CX - Tested. The bugs are of interest because: a) they're there b) they allowed the internal structure of the calculator to be probed c) they allowed new "synthetic" instructions to be coded d) only the earliest calculators have the really interesting bugs (that HP fixed really quickly) and are thus HP 41C Battery Contacts (Cleaning?) 09-23-2014, 01:10 PM . Page 1 HP-41 C repair guide A simple instruction to get a HP 41C working when battery contact strip is broken. It appears very solid and well made. This pack contains 4 small (1/2 N size) rechargeable batteries and an electronic circuit to charge these batteries. Der HP-41C und die Nachfolgemodelle HP-41CV und CX waren programmierbare Taschenrechner von Hewlett-Packard. Assembled HP-41c battery bay and expansion ports module Flat. , in response to message #1 by Dave Mabry. HP 82120A (Hurricane) - Rechargeable battery pack. Alkaline 1 Filter Options for Voltage Availability: Ships within 1 business day Product #: E90BP. Even though there are significant differences between the HP-67/HP-97 calculators and the newer HP-41C, the HP 82104A Card Reader enables you to use nearly all current HP-67/HP-97 Application Pac Programs, as well as most of the programs in the vast HP-67/HP-97 Hewlett-Packard User’s Library. 10. HP Pavilion DM4t / DV3-4000 / DV6-3000 mfl 4400 mAh. 00 € In stock Assembled HP-41c battery bay and expansion ports module Flat. , in response to message #1 by Russ Henderson. , in response to message #5 by Jon. Here is a perfect chance to fix something! The HP41 nicad pack isn't the easiest to open, but isn't too hard either. . when reviving my HP-41CL's configuration for the umpteenth time after an unforseen power loss (or getting an unresponsive HP-41C just because CLONIX is a tad picky when it comes to inrush current), i was no longer having it and decided to do my own rechargeable battery pack. Because your HP-41C uses so little power, the batteries should normally last about 9 to 12 months, depending on how much you use the calculator. There are four screws underneath the feet that are held on with adhesive. When the HP-41C is in alpha mode flag 48 is set, otherwise flag 48 is clear Low Battery Flag. thebasicHP-41C). I've installed a known good battery pack from another 41 that I use, but the HP-41 mentioned above does not turn on. MEMORYLOSTdisplay indicates that ContinuousMemoryhasbeencleared. Re: Batteries for a HP 41 CX Message #7 Posted by db on 21 July 2000, 8:29 p. (09-23-2014, 01:10 PM) Eddie W. The original model, HP-41C, was the first of its kind to offer alphanumeric display capabilities. This will leave a flat end to the battery that matches the original HP battery pack's design. Early 41C units had spring-loaded contacts in the side "tunnel" that were intended for an external power adapter that HP never sold. Re: HP-41C battery contact fix Message #2 Posted by Katie on 3 Dec 2000, 1:28 a. it is right now commencing a 2000 h stand-by test to figure out as to whether real-life battery drainage complies with calculations. or Best Offer. These are no longer available. Jun 18, 2020 · IIRC HP-41C includes a diode in the CPU board to prevent damage to circuits due to errors in battery polarity. Board index HP41C Corroded Battery Flex PCB - Help. HP 12c Financial Programmable (Beginning with Serial# CN11500001) HP 12c Platinum Financial Calculator; Battery Chemistry. You could also use a 1N4735A Zener diode, which has a higher power rating and is only slightly larger. 5; Weight: 4. The BAT annunciator will also show in the display when this flag is set Message Flag. Aug 10, 2023 · HP-41C questions - HP 41C Switching On Problem - Need Help With HP 41C Calculator Repair - stopped working after wrong battery installed - Decimal points going to 2 places - Restore to original status - HP-41CV Calculator not turning on - Where to buy battery contacts for hp 41cx? HP-41C/CV/CX. It is the real deal, in any way imaginable, just a lot better, compared to the legendary HP-41c: much longer battery life, more memory, backlit/better display, easier to configure, in-built clock, running much faster and a more compact form factor that allows you to carry it anywhere and not Hurricane II: An HP-41C Battery Pack w/ USB with its anemic energy content, utterly long charging time, short lifespan, and inability to supply the card reader about just every time you would need reading a magnetic card, the HP 82120A Hurricane truly belongs into the "most disappointing HP accessory of all times" category. HP-19C printer overhaul discoveries; Spice Service Tips (HP-31E, 32E, 33E/C, 34C, 37E, 38E/C) HP-41 Series and Peripherals Repairing an HP-41CX; Resetting an HP-41C; Repairing the HP 82104A Card Reader. What I see people doing since long time ago is to either rebuild these 82120A packs with new NiCd batteries to keep using them, as usually NiCd batteries will soon or later die in Dec 11, 2020 · when reviving my HP-41CL's configuration for the umpteenth time after an unforseen power loss (or getting an unresponsive HP-41C just because CLONIX is a tad picky when it comes to inrush current), i was no longer having it and decided to do my own rechargeable battery pack. Shore Wrote: Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart? The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the Adhesive circuit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Nov 10, 2010 · The HP 41CX Calculator comes with 4 expansion slots, which can be utilized to drive a printer, accept print instructions from a barcode, or add a magnetic card reader. Are programs from the HP User's Library still available? Tragically, many years ago, the entire User's Library was dumped into the trash. Sanding the contacts merely got right down to the plastic under the contacts. 8V. Shipping included in price for EU customers. Hello Jon & all! As requested, I propose a few pics of an Hp-41 battery pack recelled with 1/3 AA: Hp-41C battery pack recelled with 1/3 AA. When this flag is set battery power is low. The HP-41C series are programmable, expandable, continuous memory handheld RPN calculators made by Hewlett-Packard from 1979 to 1990. Re: HP-41C battery shield Message #3 Posted by Klaus on 12 Aug 2006, 12:29 p. After the control was transferred to a 68000-based HP9000-series computer, I kept using the HP-41cx daily, but not constantly, and a set of batteries lasted a couple of years. Recharger 82059D. The calculator is in very good condition- cosmetically, that is. Refurbishing a 82120A today usually is done with 1/3 AAA cells, and NiMH instead of NiCd. Apr 9, 2025 · See the HP-82160A HP-IL Module manual section ‘Flags and the Printer’ on pp. 9-10 for use and meaning of the various Printer modes and controls described above, activated using Flags 15, 16 and 21. To replace the batteries, use the following procedure (you may want to read through the entire battery replacement procedure prior to replacing the batteries): This Alkaline battery is a replacement for HewlettPackard(HP) HP41C Calculators. Part number P092 (no T suffix) are flat-top cells without tabs. It came complete with springs AND batteries! It fits great n my 41C. 0 volts so the 41 would see its input voltage drop from a good level quickly to 0 volts with little or no warning in time to change Jun 18, 2020 · IIRC HP-41C includes a diode in the CPU board to prevent damage to circuits due to errors in battery polarity. Designed to be folded in shape, it has an adhesive back with a 3M Very High Bond surface. 3 Score. 17 "hp 41c" 3D Models. Every Day new 3D Models from all over the World. BTW, though I am a Canadian I bought my 41C when visiting relatives in San Francisco. Pre-Owned · HP. Feb 22, 2024 · HP released the 82120A Rechargeable Battery Pack (and an AC Charger) as an alternative to the standard non rechargeable Battery Pack using dry N sized batteries. On my 41C and 41CV the BAT announciator comes on as soon as the voltage of the battery pack has dropped to quite exactly 4 V, which means 1 Volt per cell - the usual final discharge voltage of a completely empty NiCd/NiMH battery. I am new to this forum, and I hope somebody can help me. Finns i lager Köp 529 kr. IIRC HP-41C includes a diode in the CPU board to prevent damage to circuits due to errors in battery polarity. For the 82019B, 82109A and 82052A battery packs remove the end tabs before inserting into the plastic pack. RE: HP 41C series battery issues Try measuring the voltage of the battery pack by placing a metal rule across the two inner batteries and your DVM leads on the outer two batteries to confirm that the calculator is being powered. Re: N batteries for HP 41's Message #16 Posted by Dieter on 12 Jan 2012, 4:04 p. For many people, the HP-41C was their introduction to computer programming. Was: ILS 21. Using alkaline batteries, near the end of the battery lifetime, the BAT annunciator in the display will turn on, reminding you that about 10 to 30 days of operating time remain. New Listing NOS Vintage 1981 HP-41C/CV Calculator Overlay Kit 82152A SEALED. , in response to message #1 by thib. HP 41C Switching On Problem. A dime made a good spacer and let La HP 41c était dotée d'un processeur rapide et d'une mémoire extensible, ce qui permettait aux utilisateurs de stocker et de manipuler une grande quantité de données. „DSE nn Feb 14, 2008 · On en trouve sur eBay depuis quelques minutes un neuf en achat immédiat pour 24,50 euros avec les 4 piles neuves (et un port très raisonnable de 5,5 euros pour la France) : NEW BATTERY CASE & BATTERIES HP-41C, HP-41CV & HP-41CX. This calculator will not work properly if the case halves are not held securely together. Computers HP-75/D Battery HP 82001B Same pack as the classics. Specifications: Chemistry: Alkaline; Voltage: 1. Bumps do not appear to be symmetrical, so I suspect they are due to damage from the back side. HP 95, HP-97 and 41C Printer. > > That's the recommended approach when a 41C locks up. Shore Wrote: Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart? The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the 41CV Battery Life Message #1 Posted by Francois Fornier on 7 Mar 2006, 8:16 a. The models of the Classic series are supplied by a battery pack that is build from 3 AA size NiCd cells. , in response to message #4 by Marx Pio. I purchased a 41CV from eBay. It installs and removes very much like the original. The battery holder has new stainless steel springs and battery retention wings. This is not ideal for use in an HP-41 as many lithium-ion batteries have protection circuitry that shuts off their output at 3. Hello all, I'm new to the forum, but have been following it for a few months and rejoined the fray quite recentky when I acquired a 41CV with Time Module, X-Functions Module & Quad Module (like many other, my dream machine of the 80s). Overtightening the screws can strip the threads and lead to a malfunction. The HP 82120A is a rechargeable battery pack for the HP-41 series calculators. Filter. I popped it in my calculator and started using it again. I repaired two completely wor HP-41C: Serial Number: 2340S40265, 1983 Singapore: Accessories: Pouch: Quad memory module 82170A, s/n 2215 installed (made in Singapore) Manual: "Bedienungs- und Programmierhandbuch HP-41C" (German, 260 pages, Printed in USA, August 1978) The first HP-41C calculators came with a rechargeable battery pack. HP41c perfectly working, with Sep 7, 2017 · All about the HP-41C caclulators. Extended-use rechrgbl. Methods to repair the battery bay corrosion - probably the most frequent failure mode for HP41 calculators (HP41c, HP41cv and HP41cx) New HP Voyager connecting cable for USB C - now taking orders Search Dec 4, 2003 · Bumps do not appear next to the SST key on the HP-41C. Page 4 HP-41CV Decrement and skip if equal or less. USER Mode Annunciator Parts for battery-back port module repair kit, or module assembled for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. I absolutely love my little calculator (PX-41c) that I assembled out of the kit that Alex designed. I recharge them with an old Motorola pager that had been run over, but still had the charger and the cradle. HP-41C flex circuit problems Message #1 Posted by Brian on 30 Sept 2001, 7:44 p. Extended-use rechargeable battery 92266B Extended use charger 92266A HP-41C : Prix à l'introduction en France : 2. It will hold the output voltage as set until the input voltage falls somewhere below 2 volts. The best thing to do when BAT turns on is to put HP-41C batteries on your shopping list. There it eventually shorts out signal traces or even the supply traces; the result can be a temporary short of the battery, leaving the battery drained down, and producing strange effects & memory losses. Post: #1. The HP 41c is a calculator that was first introduced by Hewlett-Packard in 1979. > > I would put them back in and try again tonight. Aug 23, 2020 · 1) Repair kit for HP-41c battery bay and expansion ports 2) Assembled HP-41c battery bay and expansion ports module 3) Assembled HP-41c battery bay and expansion ports module Flat The battery type for the HP 41CV is a NiMH (Nickel-Metal Hydride) battery with a capacity of 170 mAh and a voltage of 4. Re: HP-41C/CV/CX Battery Pack Circuit (burnt diode) Message #3 Posted by John Keith on 24 Jan 2008, 8:55 p. Included was a dry cell battery case; the problem is that there is no polarity depiction of how the batteries are supposed to be installed. As soon as I insert the serial battery pack the wand worked fine and read the lines. Re: HP 41C Battery Contacts Repairable? Message #5 Posted by Randy on 13 June 2004, 9:04 p. 99. Shore Wrote: Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart? The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the (09-23-2014 01:10 PM) Eddie W. Chargers HP 82059B/C/D - not A, (82066B, 82068B 230VAC only) Output 8 V AC, 3 VA max. Green Cell-batteri för HP Pavillion 14, 15, etc, ersätter HT03XL, L11119-855, etc. Used internally and always tests clear Alpha Mode Flag. Also mentioned (in step 12) is to put the calculator on a hard surface, lift up one end about an inch, and set it down fairly firmly. , in response to message #1 by Ignacio Moratinos. (12-13-2020 01:38 PM) HP-Collection Wrote: Seems to become a new mass product: I suggest: Maybe there is a nice 3D printer where the PCB and the recharging batteries fits perfect, contacts between the batteries and to the calc can be done by old Siemens Gigaset Battery springs (at least that's my best goal) Feb 14, 2018 · I have some close relationship to them, because the HP-41C was the first thing, that I have programmed in the end of the 1970s. Re: "allbugs" HP 41C Message #2 Posted by Steve on 1 Oct 1999, 9:08 p. Nov 12, 2018 · (11-12-2018, 10:02 AM) grsbanks Wrote: Does anyone have a reference for the Ni-Cad cells in the HP-82120A battery back for HP-41C? Originally the pack had four 1/2 N sized NiCds. In the HP-41CX, where it had been used, it destroyed the battery contact foil. I used it heavily and then about 1990, it went into storage. I also have a Card Reader Handbook and several application pac Assembled Battery-back port module r epair kit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Hi Todd, the main difference is the trim around the screen. I've acquired an MT3068 DC-DC converter. Table of Contents. batt. I re-discovered it about a decade later and saw that it had battery damage from leaking cells. The back will come away easily. Capacity: 2200 mAH. 09. Each series uses its own type of battery pack. The contacts inside the calculator look very clean. Nicely bagged parts. Skip to content. 55. MemoryExtensions Caution: Turnthe HP-41C offprior to removingor insertingplug-inextensions. 92266B. 4. That worked for me once too. here's my take on it. On trouve ensuite assez facilement en France des piles de Type N qui durent très longtemps, par exemple des piles Type N Duracell à 0,84 € pièce (plus 4,90 € pour le port pour 12 piles), ici : DURACELL MN9100 / LR1 / LADY / N / E90 / 910A The HP-41C represents both an evolution of capabilities and system architecture and a significant departure in technology and configuration. HP 41C Repair. [] actually the HP-41CX manual recommends shorting the battery terminals > Another trick is to reverse polarity on the batteries and briefly > plug The earliest known HP-41C has a prefix of 1926 (1979 week 26), according to the HP Museum. I. Background an Information. ) HP 41C Card Reader Repair; HP 9114 repairs; Pioneer Repairs; ElectroStatic Discharge: a possible solution for the HP48 (09-23-2014, 01:10 PM) Eddie W. You insert the A/C supply in the side port to charge the battery pack while using the calculators. This Alkaline battery is a replacement for HewlettPackard(HP) HP41CX Calculators. Because the HP-41C uses so little power, the normal battery life should be 9-12 months, depending on the freshness of the batteries installed and how much you use your calculator. This HP business calculator uses reverse Polish Rechargeable battery pack 82120A. I believe the calculator was redesigned because the electronics got smaller and they could redo the 41C* so that all the electronics could get in just one Sep 19, 2024 · Battery Pack HP 41C/CV/CX Calculator Replace 82120A with Alkaline N-cells (#225057243292) u***a (865) - Feedback left by buyer. Elle disposait également d'un écran à affichage LED très clair, offrant une visibilité optimale, même dans des conditions de faible luminosité. At $295, it was less expensive than a personal computer, and—through the HP Interface Loop (HP-IL0)—it could be hooked up to a printer, plotter and mass-storage device. There are four battery contacts. The HP-41C uses CMOS (complementary MOS) circuits throughout and has an alphanumeric liquid crystal display. What I see people doing since long time ago is to either rebuild these 82120A packs with new NiCd batteries to keep using them, as usually NiCd batteries will soon or later die in Free download of a color scan of the English-language book 'HP-41C/41CV Owner's Handbook and Programming Guide' by Hewlett-Packard, which is an owner's manual (user's guide, operating manual, owner handbook) for the HP-41C and HP-41CV calculators. Not sure if cleaning the crud will revive this old friend. Verified purchase. , in response to message #15 by Garth Wilson. There are plenty of HP-41 experts on this Forum; I personally have an early fullnut 41C, a halfnut 41CV, and a late fullnut 41CX, plus a few peripherals and ROM Pacs. RE: Looking for a 82120A, HP 41C rechargable battery pack - quantalume - 01-05-2016 (01-05-2016, 02:22 AM) Nate Martin Wrote: The LiPO pack is still a work in progress with also the first prototype today, looks like everything fits so now I just need to lay out the circuit. proto #1 is feeding a HP-41CX plus CLONIX. Click to find the best Results for hp 41c Models for your 3D Printer. - There are two variants of the 82033A battery pack. Hp-41c. Playing with the unit some more I find if I insert the battery pack just right it will come on for a few minutes before locking up again. All three calculators had leaking batteries and the liquid has oxidized the copper of the battery contact block. I have been using "N" rechargeable batteries in my calculator since it was new. The board takes a CR2025 and I only had a thinner battery. Just click "Start slideshow" to get bigger pictures. Computers HP-94D/E/F Battery HP 82430A The 94 battery pack is a sealed unit which screws onto the side of the computer and also serves as a handle. , in response to message #1 by Todd Popovich. Good luck. 00 shipping "Remove this shield before using rechargeable battery pack HP82120A" I am not sure if it is a product of HP, because the construction is a bit unfortunate: It has four rivets with sharp heads that make contact with you HP-41C's battery contacts. Edit 1: Got the batteries (they are NiCd batteries after all), charged them and when I put them in my HP-41CX, I don't get any low battery indication. Find the right batteries for your Hewlett Packard HP41C Calculator Battery at Batteries Plus. All modes described there are supported except for the ‘TRACE with stack’ option. 37. Remove the battery pack. (Refer to Batteries, page 240). 37 was - ILS 21. HP-41C Price at introduction: $295 HP-41CV Re: hp 41c battery pack replacement Message #3 Posted by donald wallace on 11 Oct 2005, 4:39 p. HP-41C. hi bas, i have currently two working prototypes on my bench. This is my original HP-41C that I bought in 1980. To charge the battery pack a dedicated charger must be used. Re: HP-41CV battery pack Feb 26, 2024 · HP released the 82120A Rechargeable Battery Pack (and an AC Charger) as an alternative to the standard non rechargeable Battery Pack using dry N sized batteries. 50. ILS 17. a couple of months ago someone here said that some kind of handheld game (pokemon mabye) uses n cells, so as long as kids are using battery operated noisemakers we have batteries. Dec 3, 2021 · The most recent case of that was the PX-41C, a replica of the classic HP-41C. 3 Answers . RE: Hurricane II: An HP-41C Battery Pack w/ USB - Massimo Gnerucci - 12-11-2020 (12-11-2020, 06:39 PM) Hans Brueggemann Wrote: with its anemic energy content, utterly long charging time, short lifespan, and inability to supply the card reader about just every time you would need reading a magnetic card, the HP 82120A Hurricane truly belongs into the "most disappointing HP accessory of all Re: battery holder for HP 41C - Steve (Australia) - 02-17-2001. Cut a 1/4" (6mm) long piece for each terminal and solder over nasty, rotted battery connection points. Howard Owen wrote: > > I removed the batteries from the calculator since last night. i'm looking for battery droop in mV / day figures. -- Karl S. $35. Vieira (Brazil) on 18 Mar 2012, 10:37 p. The HP-41C did not have a volume I or II owners manual, just an Owner’s Handbook and Programming Guide and quick reference guide. , in response to message #2 by Randy. 83; Brand: Energizer Cleaning or Replacing Battery Contacts My HP-41CX had badly corroded battery contacts because the last set of cells had been left in it for several years. Past 6 months. Mar 21, 2025 · Includes a USB-C cable for easy connection to any USB power source (USB adapter not included). I have a HP-41C (square display edges, so "full nut"?). Re: hp 41c battery pack rebuild with 1/3AA Message #7 Posted by Etienne Victoria on 28 Sept 2005, 12:46 p. The main issues for me is leakage, the CX or a C/CV with a timer module draws enough current to slowly flatten nicad bateries to the point where they leak chemicals without even indicating "lowbat". Assembled Battery-back port module r epair kit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. 2) If so, is the motor from the HP-41C card reader identical? 3) I haven't yet rebuilt the battery, so the calculator was running from its adapter (which supplies regulated power to the 67, unlike some of the newer calculators where the battery acts as the regulator). The HP-41C can use either one HP82170A Quad Memory Module or up to four HP82106A Memory Modules. Apr 25, 2010 · I'm also looking at some batteries to replace those in the rechargeable battery pack, mainly the Varta 422-371 but I need to find someplace that has international shipment options. Shore Wrote: Is there anything I can use to clean off corrosion (or rust?) the golden battery contacts of the HP 41C without having to take the calculator apart? HP-41C: Serial Number: 2340S40265, 1983 Singapore: Accessories: Pouch: Quad memory module 82170A, s/n 2215 installed (made in Singapore) Manual: "Bedienungs- und Programmierhandbuch HP-41C" (German, 260 pages, Printed in USA, August 1978) (09-23-2014 01:10 PM) Eddie W. Thanks for the answer! I thought the shield was meant to stay in the calc, and not on the battery pack. Later came the HP-41CV and HP-41CX, offering more memory and functionality. HP41 battery installation Message #1 Posted by pete gianakopoulos on 15 May 2012, 11:53 a. Seems inevitable that it will fail. The best way to repair 41 battery contacts is with 1/8" (3 mm) brass channel that is available in hobby stores. This HP scientific calculator comes with a 12-character high contrast alphanumeric LCD and a completely customizable keyboard. The problems, that I have met were poor contacts due to corrosion. It is a Schottky diode, whose forward voltage drop is less than the forward voltage drop of an ordinary silicon diode, a not-so-usual and nice engineering detail. wcxhrg wdyj cusj iasrch nkawztr ffron fmpwk tld jjpoyxf izyqza