Battery replacement causes HD to disappear?

Re: MBA 11, 2012

After installing a third party battery I get the old ? Folder" when trying to start! So the games began... .

I got to Disk Utility through online recovery only to find that my former HD is not showing. I mean it's gone, nada!

I put the original battery back in (after same results when resetting the SMC) and got the same problem.

Is it possible I somehow killed the HD (an upgraded OWC flash disk and good memory); or is there a way to see if it's hiding

in the bushes somewhere beyond my aging purview:~&?

I was about to update aging batteries in a couple of other MBA's (13") and an MBP (13") that the wife and I use. However,

before I have them all under water this Mac old timer (hobbyist+) sure would appreciate some guru direction. (I'm okay with technical diy,

excepting coding.)

Thanks kindly in advance.