- Joined May 13, 2021
I have a 13.5V power supply and a 12V agm car battery that I need to keep charged up. I thought of this setup to make use of my spare power supply but I want a second opinion before I start using it. The diode has a voltage drop of 0.6V and for the resistor I am thinking of using a 1Ω 25W one. What do you guys think? Thanks for your help.