Button battery voltage is no 5V?
If you use 5V power supply, you have to use the conversion.
In addition, there are button-shaped Farah capacitors (role and shape similar to the button battery), that is, 5.5V and 2.7V.
Yes, the button batteries are 1.2V, 1.5V, 3.0V, 3.6V, etc., are often used to combine, series, parallel can be composed after a variety of voltage and capacity.
