Mary Frase this behaves and sounds like a bad depleted battery. Let us know what tablet you have. Your title inquires about a Nook, but you chose a Samsung Tab as the device. Until we know for sure, we cannot guide you regarding a battery change.
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=== Update (12/12/2022) ===
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Mary Frase perfect. Use this guide [guide|84990] to change your battery. After that re-evaluate.
Mary Frase this behaves and sounds like a bad depleted battery. Let us know what tablet you have. Your title inquires about a Nook, but you chose a Samsung Tab as the device. Until we know for sure, we cannot guide you regarding a battery change.