The MHRA has posted a video on youtube featuring Mr Jeremy Mean. So far it's received just 12 comments. We can do better than that, can't we?
https://www.youtube.com/watch?v=95yRsFwnyjc
According to my Ohm's Law calculator, running a 2.0 ohm coil at 4.0 volts produces 8 watts of power with a current of 2000 milliamps.
To calculate how long a fully charged battery would take to fully discharge I figured you'd use the formula mAh/mA, but for 900mAh that gives 900/2000 = 0.45...
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