[Premium-Rx] RA 1792 backup battery (also applies to the RA6790/GM)

[Dan Rae]

John Nelson wrote:

>The Racal RA1792 CPU board uses a 2.4V NiCd backup battery. In some early
>samples I have, the battery is a GE DataSentry DS2SD. This measures about 40
>x 13mm and has four pins on its base, of which two diagonally opposed ones
>are positive and negative. For the life of me I can't find any reference to
>this device and nothing of a similar size and pinout appears to be available
>in the UK. It would be easy enough to fit one of a variety of 2.4V NiMH
>batteries but it would be nice to find one that physically matches the old
>one. 
>
>Any thoughts from 1792 users greatly appreciated.  
>  
>
The equivalent to this one can be had from Varta John, but it is hard to 
find.  Even Racal (UK) used to put a little daughter board to accept the 
little green NiMH ones, UK RS part number:  422-371, which has the added 
advantage of a little distance from the electronics.  And less 
likelihood of leaking, although they *can* also leak, and should be 
checked every so often.

This one can be had from Mouser in the US part number  672-55615302

Get the old GE one out asap, they are really bad news.

The replacement Ni MH Varta with the original footprint is part number:  
55615702012.  It can be had from Mouser in the US, their part number: 
672-55615702

73 again
Dan
ac6ao / g3ncr