I've had to learn to do almost everything myself, too.
Something you can do, since you're just measuring open ended voltage (no load attached) is to wrap some tape or a rubber band around the battery to hold the button in while you check the voltage at the threads.
I wouldn't do this with an atomizer attached, but it should be alright with something like a light bulb or a resistor if you want to check the battery under load.
Something you can do, since you're just measuring open ended voltage (no load attached) is to wrap some tape or a rubber band around the battery to hold the button in while you check the voltage at the threads.
I wouldn't do this with an atomizer attached, but it should be alright with something like a light bulb or a resistor if you want to check the battery under load.