This is not a light build but I know you guys can answer the question :-)
I have a 12VDC fan that draws .15A or 150mA. If I run in series 4 x 3.2v 18650 2400mAH batteries to power the fan. Will I be able to power the fan for 9600mAH / 150ma = 64 hours?
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Thread: basic power consumption question