Interestingly(?) both my RK05 and RK05J had an assembly of 3, not 4, 2/3rd AA NiCd cells for retract, completely decayed of course. I replaced them with 3 discrete tagged NiMh AA cells (plenty of headroom) soldered and shrinkwrapped. They work fine, lots of retract force. The clip which holds them is shaped for only 3 cells so it seems as though there were at least 2 variants. I read the circuit diagram and could see that it would make little difference whether it was NiCd or NiMh (or for that matter 3 or 4 cells). I think DEC were a bit overgenerous with the trickle current (though IIRC NiCds were rather leakier back then).
> From: tony duell <a...@p850ug1.demon.co.uk> > > The DEC RK07 (and I assume RK06) used 8 1/2 AA cells in a pack (like > 2 RK05 retract batteries in series). When I replaced those, I used 2 of > the cordless telephone batteries (that have been recommended for > the RK05) in series. > > -tony
