dwcraig1 wrote:

It seems to me that folks are confusing the listed operating voltage of 3.2 - 4.2 volts as output voltage. I don't have one to test it but surely this is input voltage to the board.Also it must surely be buck/ boost as using a 3 ohm coil would be less than 6 watts output. Really, am I the only one seeing this?

Perhaps read the thread first?