13 comments. Best. Add a Comment. markus_b • 3 yr. ago. There are USB C trigger circuits to make the UBC power adapter output 12V. But to charge your lead acid battery you need 13.8V not 12V, so this will not work. There are USB PD adapters who can output an arbitrary voltage, but they are rare. My car battery gets dead if I don't use the car for 10 days or more. Is it possible to charge it using 12v 2A power supply of my dth set top box. ? EDIT: Just measured the voltages using DMM. Car battery=12.06 V and DTH Set Top Box suppy=12.43 V. Your 12v adapter would only be able to raise the battery voltage to 12v, but to charge a car battery fully you would need to raise the voltage to 13.8v. The 16v adapter would raise the voltage too high and could cause damage. To charge your car battery with a 12V adapter, you'll need to connect the positive and negative terminals of the adapter to the corresponding terminals on your car battery. Once connected, the adapter will provide a steady flow of power to recharge the battery. A car battery needs a charge of 12 volts to start. The amount of charge that a battery can hold depends on the size of the battery and the number of cells. A typical car battery has six cells, each of which can hold a charge of 2 volts. So, a fully charged car battery will have a total charge of 12 volts. You can charge it with a 12V adapter. Just follow these simple steps: 1. Hook up the positive (red) lead from the adapter to the positive terminal on the battery. 2. Hook up the negative (black) lead from the adapter to the negative terminal on the battery. 3. Plug in the adapter to an outlet and turn it on. 4. 20sYXuR.

charge car battery with 12v adapter