I need a Lithium ion battery for a project.
In many places, I have searched and there seem to be 2 different voltages for the Li-ion battery. One is 3.7V and one is 4.2V. In someplaces, it is said that the Li-ion battery is a standard one. Typical battery voltage i 3.7V and maximum battery voltage is 4.2V. In other places, it is mentioned that 3.7V and 4.2V lithium batteries are two different voltage level batteries.
Can someone please confirm which one is correct?
Also, when I need to charge this battery (3.7V or 4.2V), can someone tell me the safe range of the battery charging input voltage (What input voltage at Vdd pin?) that I need to give to this Charge controller IC? What input for 3.7V and What input voltage for 4.2V? Also, please tell me whether I use the maximum input vdd voltage of 6V for charging these batteries using the above charger controller.