Thats pretty much the case with your average equipment but when you are dealing with the fine coils in an electronic shutter you have to take the batterys internal resistance into consideration. If the coil was designed for a certain battery supplying x milliamps of current it might not have enough resistance in the coil to handle a battery that delivers 4x the current and may burn out. I found a resistor of several hundred ohms and tried it out and seems to work fine with it as a ballast resistor. Thanks!
Originally Posted by Bob F.