HP41CV calculator batteries

[Richard Head]

Does anyone know where I can get the unusual batteries used in the HP41CV calculator?

[PeterG]

From what i found on Google, it uses 4 "N" 1.5v batteries. They can be found at most battery suppliers.

http://www.ebay.com.au/itm/6-x-LR1-1-5V-Alkaline-battery-E90-N-KN-MN9100-910A-New-/180652840213?pt=AU_Electronics_Batteries_Chargers&hash=item2a0fbf9515

Regards

[VK5RC]

FYI  (if you don't already know of these sites)
http://www.hp41.org/Intro.cfm
http://http://stores.ebay.com.au/VINTAGE-CALCULATORS?_rdc=1
http://www.hpmuseum.org

[Richard Head]

Thanks for the suggestions. I'll have to buy them online as I can't find them locally.

Regards

Dick

[Richard Crowley]

I found an HP41 in the recycle bin at the office last week. It was missing the battery holder/door.  I'm considering getting a couple of LiPo cells to stick in there to replace the four N-cells.  Do you think the circuit could tolerate the extra supply voltage?

[FireBird]

While switched off, the circuitry is powered from the batteries minus one diode drop. When switched on, a little switch mode PS creates a stabilised 6V. I’m not sure if the regulation will work at all if the supply is already higher than the target voltage.

[1xrtt]

I ordered these a couple of days ago:
http://www.ebay.com/itm/190570442032?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
I have a 28S and finding these batteries is also hard around here.