That is an awesome idea!
Yes, i did run it on pair of 2300 mAh Duracell nimh batteries. Dont know how long would last, didnt manage to test it but i was thinking of connecting spray thing to some 2.5V DC dc power adapter or something (but didnt have one so low at hand). Tried some cellular chargers, led is blinking but motor wont work
Yep, cell charger current is too low.
I doubt the Airwick has any voltage regulation built-in. But 3.3V is a common max voltage for microcontrollers, so it can probably
handle that voltage without a problem; and that opens up a few possibilities. Plus you'd get more motor torque too.