[MRCA] MA4230/4231 Morse encoder/decoder

[W2HX]

Hi all,

Recently picked up this neat accessory for encoding/decoding morse with burst capability.  Here is a picture of the two units:
http://www.w2hx.com/x/Racal/MA4230/1.jpg

I decided to pull out the batteries before they leak and destroy the units. The 4230 encoder's battery was intact and had about 5V on it. I removed it anyway since it was clearly original to the unit (Soldered in place).  The 4231's battery however, was leaking. Fortunately, I got the battery out and nothing was obviously affected.  

I would love to find a battery to replace these.  But I have no idea what voltages they are. I am guessing they are NiCd batteries. Here is a photo of the battery. It is a VARTA and the numbers on it include A85 and 0460 73366

http://www.w2hx.com/x/Racal/MA4230/4230%20Encoder/IMG_2123.JPG

Anyone have any idea on this battery?

Some other internal pictures of these units in case you're interested.
http://www.w2hx.com/x/Racal/MA4230/


 
73 Eugene W2HX