Actually, not any USB connector, must be USB Type A/Micro-B, to be more exact.
Also, I would not advise to charge via USB or computer unless you are 100% sure of the voltage output, especially when running from battery. The output won't be the same and won't charge properly. The same applies for USB hubs.
Regarding which one will fit the Nook, what you need to check is: output voltage and output mAh. Those specs are in the Nook's manual, the Nook battery or online. Whatever matches should work with your Nook.
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