Batteries for HP 15C calculator

[Bent]

I have a HP 15C calculator. But without the 3 micro batteries. Can anybody help with the type ??

[JasonG]

Hi there,

what you need is a set of SR44, silver oxide, cells. They are available all over the place but, unfortunately, come with a wide range of type numbers...have a look at http://www.hpmuseum.org/collect.htm#dispbatt
for a bit more information about equivalent types.

The lithium types listed will also work but will not last as long as the silver oxide types.

Regards, and happy hunting...

JasonG

[Barry Schwartz]

According to the HP15C Manual, the following batteries are recommended:

Alkaline:
Eveready A76
UCAR A76
RAY-O-VAC RW82
National or Panasonic LR44
Varta 4276

Silver-Oxide:
Eveready 357
UCAR 357
RAY-O-VAC RS76 or RW42
Duracell MS76 or 10L14
Varta 541

[Randy]

I usually look for everedy 357, then get something compatable to it at radio shack.

Randy

[Karl Schneider]

Just yesterday, I bought three German-made, sealed silver oxide #76 cells at Radio Shack for a Voyager calc. P/N is 23-009; price was $2.99 each. They didn't seem to have the cheaper alkaline type.

[David Smith]

Yikes! If you can find them the Vinnic brand of batteries is very inexpensive and actually work rather well. A card of 10 cells sells for $2.50-$3.00. They show up on Ebay quite regularly.

[O.J.M.]

I have also used the Vinnic batteries, and they have worked well for me - a good value at that price. If you can't find them, you can still save a few bucks at Radio Shack by finding and purchasing a 6 volt camera/photo battery they carry by the Radio Shack catalog number 23-469. It's a Duracell alkaline photo battery, and it's listed as being equivalent to a PX28AB, A544, and 4LR44 types. The "4LR44" gives a clue about it's insides, because if you then pry off its outer shell, you'll find that it's just a stack of four LR44 cells, three of which will work just fine in the Voyager calc. At $3.79, that's less than a buck a cell, a lot cheaper than buying the cells individually at Radio Shack. Just make sure to buy the alkaline version of this battery, as there is also a lithium equivalent out there that won't work.

[Math Geek]

Indeed, there is no need to overspend. But even at 2.99 per, that's still only about $0.60/year of go-juice.