HP-11C - 25 years on original batteries!



#4

I received my HP-11C calculator as a gift in 1981 while studying physics at Central Washington University. I used it intensely for my four years at the university, and have used it as my main calculator ever since I graduated. I have never changed the batteries in the last 25 years! Every day I turn it on and wonder if it will be its last day – but it just fires-up and is ready for work. I’m not sure if there are any records for battery longevity, but 25 years seems like an awfully long time. I’m not sure if it’s a testament to the 11C or to the batteries; my guess is both can share the credit. If anyone has a similar story for 25+ years on the same batteries, let me know.

Edited: 15 Jan 2006, 4:05 p.m.


#5

You should regularly change the batteries even though they are still good. One day you will wake up and find the battery seals cut loose and spewed battery barf all over the innards of you wonderful pet machine.

#6

I changed the batteries on my HP-11C in october. They did last 20 years.
They were not actually dead, but the "snowflake" sign has been on since the last year or so.

The change was a "birthday present": according to the serial number, my 11C was built in the last week of october in 1985.


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 50g : More on best rechargeable batteries Miguel Toro 1 394 12-12-2013, 05:31 PM
Last Post: David Hayden
  Strange HP 25 Problem (Repair) Onur Ilkorur 5 559 12-06-2013, 05:13 PM
Last Post: Onur Ilkorur
  WTF? W-here T-o F-ind the original hpmuseum forum? Alexander Oestert 40 2,902 12-05-2013, 01:25 PM
Last Post: Matthias Wehrli
  HP-25 Wayne Selway 1 255 11-22-2013, 12:58 PM
Last Post: Michael de Estrada
  HP 50g : Best rechargeable batteries ? Miguel Toro 14 822 11-16-2013, 03:35 PM
Last Post: Dieter
  Storing HP-42S without batteries Yriarte 4 428 10-19-2013, 08:32 PM
Last Post: walter b
  Interesting Base Conversions - Porting a 1975 HP 25 Program to the HP 35S Eddie W. Shore 1 276 10-13-2013, 07:49 PM
Last Post: BruceH
  HP-12C batteries Yriarte 4 391 10-12-2013, 10:39 PM
Last Post: Yriarte
  BATTERIES' SWAP ON HP 48GX aurelio 7 563 10-06-2013, 07:50 PM
Last Post: aurelio
  re-recording original cards aj04062 2 307 09-15-2013, 10:32 AM
Last Post: Dieter

Forum Jump: