Tupperware barn find , worlds first portable battery pack?

cornshank

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california
It looked like something real mysterious,
It looks like a battery backup ,or battery pack? not sure if the hippies left it or my old friend made it .
B823F831-528C-49D0-8030-E9776331153B.jpeg
8010DAD6-ECD7-450B-B1F3-B15A0D76DDB3.jpeg
 
If you expand the photo the diagram inside the battery 🪫 cradle shows the poles to be opposite. Not sure if that means in a series or parallel??
My guess was for flashlight , forgot to mention,he also had a flashlight collection that was mostly donated to historical Society, I got to keep a few, I'll post some pics someday.
He also had his own strain of tomatoes, so it also could have been a tomato shocker .
 

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