Thanks for reply. I found enough encouraging evidence to say yes-ok so I proceeded and the plot thickened...
Put in new battery and turned on laptop. Booted up and displayed “plugged in, no battery detected”.
I left it like that for an hour to see if as the battery perhaps still took a charge the system may recognize and acknowledge it. Nope.
Unplugged and powered on machine. Strangely enough it fully booted up BUT still showed no battery detected.
Knowing full well from My Cousin Vinnie that I am unable to violate the laws of physics when it comes to cooking grits OR running a laptop with absolutely no power I was unsure of what to do next; so I:
Powered down, unplugged from wall and removed new battery. Held power button down for 2+ minutes to fully discharge. Put battery in, plugged in to wall and booted up. Still not recognizing battery.
Went into device manager and uninstalled "Microsoft ACPU Compliant Control", scanned for hardware changes, Nothing; rebooted, zilch.
Powered down, put old battery in, powered on while plugged into wall, upon booting received status of “plugged in but not charging”.
Went to acer site and downloaded flash-bios update, ran; nada, still not charging.
Pwr Dwn, put in new battery, pwr up, goose-egg still not even detecting.
So as it stands I have an old (original) battery which is detected but does not charge by laptop, shows 6% charge and laptop immediately shuts off if removed from wall power... AND
A new battery (non-OEM) which is not even recognized by the laptop but which runs it.
Laptop is 18 months old so it’s out of warranty.
I really need a laptop, not a modern looking desktop with folding lid.
Any additional ideas greatly appreciated before I attempt impact testing .?.?