I'd give it another go, leave it plugged in for an hour, hit the reset & see what happens. Usually the batteries will recover but Li batteries shouldn't really be deep discharged else they can die. It may also help if you have a wall charger, some computer usb ports deliver a lower current output than others, I think the min is about 100mA & the usual 500mA. A USB wall charger would be best in your circumstances at present.
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