This might be a bit of an odd one but I am using an 18650 battery as a power source which puts out about 4.2v on a full charge and as many as 20 amps. I am trying to use a relay in my circuit but am having trouble finding a 4v relay that will support more than 1 amp. I was thinking about using 3 18650 batteries to be able to run at 12v high amp relay but I would then have to reduce the power down to 4v before it reaches the kanthal heating element. Is there any way to use a 12v relay in a 4v circuit?