✅ SOLVED Odd metal cylinder in my back yard

[James57]

I was testing an old Compass Yukon 77B in my yard and I found this odd metal cylinder a few months ago. It was grey-silvery when I found it and it looked like a piece of round metal stock except it was so lightweight. On my E-Trac it comes in at 16-01 with an iffy signal like a bit of foil so I might not have bothered digging it. It is 5.5" long x 15/16" in diameter and it weighs 4.16 oz (140mm x 24mm x 118 g). It sat in my garden for several months after I dug it. There are no seams or any features but I can see a bit of greenish on one end now that the cylinder has been in the weather for a few months.

Does anyone know what this might be? If this is a solid piece of metal, the density of the metal would be less than aluminum. Maybe it is hollow and sealed with no seams? My yard was a once a farm and it would have had some huge tree stumps when it was cleared. I was wondering if this could be a very large blasting cap or something explosive related? Just wanted to check before looking closer at this item.

 

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[rebelminer]

Looks like a solid piece of steel to me....Probably a piece that was cut off of a line shaft.

 

[pepperj]

Carbon battery

 

[Georgivs]

Carbon battery

Yup it's the core out of an old battery. I think they're doped with metal and that's why it sets a detector off.

 

[James57]

Thanks! That is probably what it is, maybe from an old radio battery or something. I've seen smaller versions that are about the size of a Sharpie but I haven't seen one this size.

 

[Fourman110]

Carbon rod!