What battery for 11 C?
#1

I'm remembering 675, but the batteries that came out are energizer EPX76. I can't find my manual. I love this calculator and can't live without it. Worried about causing it harm with wrong battery. Any help is appreciated!

Thanks,

Dave

#2

1.5 volt button cells:

Silver Oxide, type 357

or

Alkaline, Type LR44


You may also find type SR44---they should work, too.

#3

Thanks Bill!

Dave

#4

There is a site on Internet that specializes in the SR44. As I remember it is www.SR44.com Bulk packed, but prices and service are good.

#5

Thanks!

Also, another note:


I do not have my 11-C manual in front of me, but I remember that in it, HP actually showed that the operating length of time after the battery annunciator comes on, is different for the Siver Oxide (SR44, 357) than it is for the Alkaline (LR44) batteries. (I remember this only because I read it first when I was 14 years old and so it stuch with me all these years. Ah, the young brain.....)


If I remember correctly, the Silver Oxide batteries have longer life, but die in only 30 minutes or so after the battery annunciator comes on, whereas the alkalines have a shorter life, but die more gradually.


Can anyone confirm? (I will re-post this evening from home if my statements are incorrect).


Regards,

Bill

#6

Hi Bill,

The manual says, that after the asterisk first appears:

              Calc ON      Calc OFF
------------------------------------
Alkaline > 2 hours > 1 month
Silver ox > 15 min > 1 week

Best regards from V.

#7

If I remember correctly the SR-44 has an anticipated life of about 2 to 2.5 times that of the Alkaline equivalent.
I have used SR-44 in HP-42S and HP-32SII and not noticed that behavior -- however, that does not mean it does not happen. I think the SR-44 is probably more cost effective.

As with anything there are trade-offs.

#8

If you can find them, Vinnic (a Chinese company) makes very inexpensive LR44 batteries. I have seen cards of 10 for between $2 and $3... what a lot of places sell a single cell for. A guy on Ebay seems to always have them at that price. Also Tanner Electronics in Carrolton TX (but he does not do mail order).



Possibly Related Threads…
Thread Author Replies Views Last Post
  OT: Simulating a TI calculator with crazy 11-bit opcodes Egan Ford 8 2,575 08-13-2013, 12:06 AM
Last Post: Paul Dale
  SAM-BA v 2.11 for flashing WP34S Tom Sauntry 6 2,015 05-22-2012, 11:02 AM
Last Post: Massimo Gnerucci (Italy)
  aOT--Battery/battery contact care advice needed Matt Agajanian 0 1,118 04-24-2012, 07:35 PM
Last Post: Matt Agajanian
  SpeedUI 11.11 available Raymond Del Tondo 0 708 12-20-2011, 07:28 PM
Last Post: Raymond Del Tondo
  HP-15C (& LE!) 11-11-11 Mini-Challenge Valentin Albillo 28 6,749 11-14-2011, 08:12 AM
Last Post: Valentin Albillo
  SpeedUI 11.10 available Raymond Del Tondo 2 1,117 10-03-2011, 08:30 AM
Last Post: Raymond Del Tondo
  9/11 Jean-Michel 4 1,451 09-11-2011, 08:52 PM
Last Post: Don Davis
  SpeedUI 11.07 supports RainEQ Raymond Del Tondo 2 1,084 07-30-2011, 11:31 PM
Last Post: Raymond Del Tondo
  Project Euler Problem 11 on the HP 48GX? Peter Murphy (Livermore) 13 2,973 07-12-2011, 02:43 PM
Last Post: C.Ret
  SpeedUI 11.06 released! Raymond Del Tondo 6 1,790 07-09-2011, 06:21 AM
Last Post: Olivier De Smet

Forum Jump: