It's probably the Nook Color, if that's the case. It was a decent tablet in its day, and the first tablet I ever had. It ran Android 2.2 (Froyo) and was relatively easy to root. Some people were able to install later versions of Android on this device. The tablet has a microSD card slot, but didn't have a lot of internal storage by today's standards. If yours can still run, you may find it a bit slow.
That said...
If it doesn't turn on now, that's not a good sign! Besides, you're dealing with a device with a ten year old battery and an old OS. Finding compatible apps could be a problem.
If you can find a charger cable for not much money, it might be worth trying to charge it and see what happens. Otherwise, unless you like tinkering with old devices, you'd be better off properly disposing of it. "Nothing to see here! Move on!"
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