Does anyone recognise this dual battery holder?

[johnsn]

It says apple 1989 on the back.
johnsn

 

[slomacuser]

It is for Macintosh II or IIx

 

[johnsn]

Cool, Thanks.
johnsn

 

[lilliputian]

If your Mac II's batteries needed replacing, they would replace the soldered-in batteries with one of these, so future batteries could be replaced more easily.