So, I have a bunch of Lithium Ion batteries, but very few of them have a corresponding charger. I also have a Lab Power Supply (linear), 0-36V 0-5A. The batteries I need to charge are 3.7V and 7.4V
I have noticed that a fully charged (fresh off a real charger) 3.7V battery actually tests to about 4.2V, and a fully charged 7.4V to over 8.0V So, if I was charging a 3.7V Li-Ion battery, would I simply set the power supply to 4.2V? What about polarity, does the + of the power supply go to the - of the battery, or vice verse? Do I need to pay attention to the 3rd pin most of these batteries have?
Thanks for any info
-Chris P