What brand / name / type were the Original 12c batteries?

[Gene Wright]

I know you can use three Energizer 357 type cells, but does anyone know what was shipped with the first 12c models?

Curiosity and a cat have a meeting later.

[Michael de Estrada]

According to the handbook dated August 1981, various batteries were recommended replacements:

Alkaline:

Eveready A76, UCAR A76, RAY-O-VAC RW82, National or Panasonic LR44

Silver-Oxide:

Eveready 357, UCAR 357, RAY-O-VAC RS76 or RW42, Duracell MS76

Silver-Oxide will last more than twice as long as Alkaline

Edited: 21 Apr 2011, 12:59 p.m.

[bill platt]

but that doesn't answer the question. (And Gene already knows that list by heart :-)

I have to query my crainial database for memory of the 1st time I opened the battery compartment of my 11c, to see if I remember the brand, and then extrapolate that to the 12c.

Something jogs in me that they were alkaline. But how could that be a reliable memory? Too long ago and not an important thing to remember. I do remember being interested in the Silver for two reasons: one being the longer life, and the other being the interesting fact that alkalines go dead more gracefully.

[Michael de Estrada]

Doesn't it stand to reason that the original batteries would have been the same as one of the recommended replacements? I seem to recall when I changed the original batteries in my HP-15c that they were A76 alkalines.

[Randy]

A76's from Eveready with the small Union Carbide logo stamped on them.

Edited: 21 Apr 2011, 1:47 p.m.

[db (martinez, ca.)]

Corroborating Evidence: i believe it was union carbide in my 11c too.

[Palmer O. Hanson, Jr.]

Gene:

I have three HP-11C's. Two have Kodak KA76's in them -- not even on the list. One of the two is S/N 2217A03623 which is an early enough unit to have the bug. I am fairly sure that I have never replaced the cells as I have hardly ever used it. The other has MS76 Silver Oxide cells.

[Gene Wright]

Thanks all!