HP battery eliminator connectors - found

dwight elvey dkelvey at hotmail.com
Mon Feb 26 01:02:08 CST 2007

>From: "Jay West" <jwest at classiccmp.org>
>Gordon wrote...
>>>What exactly does this plug do?
>To which Glen replied...
>>Here's the basic story.  ...
>Yup, the plug goes to the back of the cpu to make a battery-optioned system 
>think a battery is attached. All just as Glen said.
>However, the same type of plugs & sockets on the back are also used to 
>daisychain power signals from cpu to memory expansion box and/or i/o 
>expansion box. This is so if you turn on the cpu, the memory and I/O 
>backplane expansion boxes power up as well.
>Few people have the mem or I/O expansion box in play, most don't have it or 
>don't need it. The real reason the connectors have been sought is to build 
>these "battery eliminator plugs". Sure, you can just stuff a resistor 
>across the right two holes in the connector. Or you can solder the 
>connector inside the power supply. I don't like either option, I'm to much 
>of a purist about having the original stuff operational "as it was".
>HP actually did sell the battery eliminator plugs for use when the battery 
>backup wasn't connected. I just wanted more of them :D

Of course, one could also make up a battery pack and be completely
Looking at the specs, that would be a little tough. As I recall, it
would take 4 lead acid cells( 6 volt batteries have only three ).
It would require getting single cells to build up the needed
number of cells that matched.
I do know what you mean about keeping it original if possible.
That is why I wouldn't take my own suggestion.
I often wondered if these machines actually had battery boxes
connected to them when they were in use or if they had
the official connector and someone stripped it off and lost it.


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